15779905910572 has 6 divisors (see below), whose sum is σ = 27614835343508. Its totient is φ = 7889952955284.

The previous prime is 15779905910491. The next prime is 15779905910609. The reversal of 15779905910572 is 27501950997751.

It is a super-2 number, since 2×15779905910572² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15779905910498 and 15779905910507.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1972488238818 + ... + 1972488238825.

Almost surely, 2^{15779905910572} is an apocalyptic number.

It is an amenable number.

15779905910572 is a deficient number, since it is larger than the sum of its proper divisors (11834929432936).

15779905910572 is a wasteful number, since it uses less digits than its factorization.

15779905910572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944976477647 (or 3944976477645 counting only the distinct ones).

The product of its (nonzero) digits is 62511750, while the sum is 67.

The spelling of 15779905910572 in words is "fifteen trillion, seven hundred seventy-nine billion, nine hundred five million, nine hundred ten thousand, five hundred seventy-two".