1016555540 has 96 divisors (see below), whose sum is σ = 2866316544. Its totient is φ = 292469760.

The previous prime is 1016555539. The next prime is 1016555543. The reversal of 1016555540 is 455556101.

It is a junction number, because it is equal to n+sod(n) for n = 1016555497 and 1016555506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1016555543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5369 + ... + 45408.

It is an arithmetic number, because the mean of its divisors is an integer number (29857464).

Almost surely, 2^1016555540 is an apocalyptic number.

1016555540 is a gapful number since it is divisible by the number (10) 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 1016555540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1433158272).

1016555540 is an abundant number, since it is smaller than the sum of its proper divisors (1849761004).

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

1016555540 is a wasteful number, since it uses less digits than its factorization.

1016555540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50817 (or 50815 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 1016555540 is about 31883.4681300513. The cubic root of 1016555540 is about 1005.4883363907.

The spelling of 1016555540 in words is "one billion, sixteen million, five hundred fifty-five thousand, five hundred forty".