15261139781664 has 96 divisors (see below), whose sum is σ = 46900088194176. Its totient is φ = 4253976238080.

The previous prime is 15261139781627. The next prime is 15261139781681. The reversal of 15261139781664 is 46618793116251.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 15261139781598 and 15261139781607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276924027 + ... + 276979130.

It is an arithmetic number, because the mean of its divisors is an integer number (488542585356).

Almost surely, 2^{15261139781664} is an apocalyptic number.

15261139781664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15261139781664 is an abundant number, since it is smaller than the sum of its proper divisors (31638948412512).

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

15261139781664 is a wasteful number, since it uses less digits than its factorization.

15261139781664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553903218 (or 553903210 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The spelling of 15261139781664 in words is "fifteen trillion, two hundred sixty-one billion, one hundred thirty-nine million, seven hundred eighty-one thousand, six hundred sixty-four".