15779116250065 has 64 divisors (see below), whose sum is σ = 23070274560000. Its totient is φ = 10119398065920.

The previous prime is 15779116250057. The next prime is 15779116250111. The reversal of 15779116250065 is 56005261197751.

It is not a de Polignac number, because 15779116250065 - 2³ = 15779116250057 is a prime.

It is a super-2 number, since 2×15779116250065² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15779116249988 and 15779116250015.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 530536095 + ... + 530565835.

It is an arithmetic number, because the mean of its divisors is an integer number (360473040000).

Almost surely, 2^{15779116250065} is an apocalyptic number.

It is an amenable number.

15779116250065 is a deficient number, since it is larger than the sum of its proper divisors (7291158309935).

15779116250065 is a wasteful number, since it uses less digits than its factorization.

15779116250065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39950.

The product of its (nonzero) digits is 3969000, while the sum is 55.

It can be divided in two parts, 157791 and 16250065, that added together give a triangular number (16407856 = T₅₇₂₈).

The spelling of 15779116250065 in words is "fifteen trillion, seven hundred seventy-nine billion, one hundred sixteen million, two hundred fifty thousand, sixty-five".