3651204540 has 144 divisors (see below), whose sum is σ = 10903122720. Its totient is φ = 912729600.

The previous prime is 3651204533. The next prime is 3651204551. The reversal of 3651204540 is 454021563.

It is a super-2 number, since 2×3651204540² = 26662589185833223200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3651204498 and 3651204507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2186826 + ... + 2188494.

It is an arithmetic number, because the mean of its divisors is an integer number (75716130).

Almost surely, 2^3651204540 is an apocalyptic number.

3651204540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3651204540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5451561360).

3651204540 is an abundant number, since it is smaller than the sum of its proper divisors (7251918180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3651204540 is a wasteful number, since it uses less digits than its factorization.

3651204540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 3651204540 is about 60425.1978896222. The cubic root of 3651204540 is about 1539.8510762832.

The spelling of 3651204540 in words is "three billion, six hundred fifty-one million, two hundred four thousand, five hundred forty".