15651515660 has 24 divisors (see below), whose sum is σ = 35856200016. Its totient is φ = 5691460160.

The previous prime is 15651515657. The next prime is 15651515707. The reversal of 15651515660 is 6651515651.

15651515660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35571407 + ... + 35571846.

It is an arithmetic number, because the mean of its divisors is an integer number (1494008334).

Almost surely, 2^15651515660 is an apocalyptic number.

15651515660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15651515660 is an abundant number, since it is smaller than the sum of its proper divisors (20204684356).

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

15651515660 is a wasteful number, since it uses less digits than its factorization.

15651515660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71143273 (or 71143271 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 41.

Subtracting from 15651515660 its reverse (6651515651), we obtain a palindrome (9000000009).

The spelling of 15651515660 in words is "fifteen billion, six hundred fifty-one million, five hundred fifteen thousand, six hundred sixty".