15665656652 has 12 divisors (see below), whose sum is σ = 27418179096. Its totient is φ = 7831891200.

The previous prime is 15665656639. The next prime is 15665656687. The reversal of 15665656652 is 25665656651.

It is a junction number, because it is equal to n+sod(n) for n = 15665656594 and 15665656603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195974 + ... + 264077.

It is an arithmetic number, because the mean of its divisors is an integer number (2284848258).

Almost surely, 2^15665656652 is an apocalyptic number.

It is an amenable number.

15665656652 is a deficient number, since it is larger than the sum of its proper divisors (11752522444).

15665656652 is a wasteful number, since it uses less digits than its factorization.

15665656652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468568 (or 468566 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 53.

Subtracting 15665656652 from its reverse (25665656651), we obtain a palindrome (9999999999).

The spelling of 15665656652 in words is "fifteen billion, six hundred sixty-five million, six hundred fifty-six thousand, six hundred fifty-two".