15601656540 has 48 divisors (see below), whose sum is σ = 44135011872. Its totient is φ = 4117549056.

The previous prime is 15601656529. The next prime is 15601656593. The reversal of 15601656540 is 4565610651.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1334529 + ... + 1346168.

It is an arithmetic number, because the mean of its divisors is an integer number (919479414).

Almost surely, 2^15601656540 is an apocalyptic number.

15601656540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15601656540 is an abundant number, since it is smaller than the sum of its proper divisors (28533355332).

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

15601656540 is a wasteful number, since it uses less digits than its factorization.

15601656540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680806 (or 2680804 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The spelling of 15601656540 in words is "fifteen billion, six hundred one million, six hundred fifty-six thousand, five hundred forty".