5661512604 has 48 divisors (see below), whose sum is σ = 16012362240. Its totient is φ = 1715609520.

The previous prime is 5661512603. The next prime is 5661512641. The reversal of 5661512604 is 4062151665.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661512603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2381604 + ... + 2383979.

It is an arithmetic number, because the mean of its divisors is an integer number (333590880).

Almost surely, 2^5661512604 is an apocalyptic number.

5661512604 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

5661512604 is an abundant number, since it is smaller than the sum of its proper divisors (10350849636).

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

5661512604 is a wasteful number, since it uses less digits than its factorization.

5661512604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765607 (or 4765599 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 5661512604 is about 75243.0236234563. The cubic root of 5661512604 is about 1782.2863986621.

The spelling of 5661512604 in words is "five billion, six hundred sixty-one million, five hundred twelve thousand, six hundred four".