15051957561 has 12 divisors (see below), whose sum is σ = 22066220592. Its totient is φ = 9884867256.

The previous prime is 15051957553. The next prime is 15051957587. The reversal of 15051957561 is 16575915051.

15051957561 is a `hidden beast` number, since 1 + 5 + 0 + 5 + 19 + 575 + 61 = 666.

It is not a de Polignac number, because 15051957561 - 2³ = 15051957553 is a prime.

It is a super-2 number, since 2×15051957561² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15051957061) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12480291 + ... + 12481496.

It is an arithmetic number, because the mean of its divisors is an integer number (1838851716).

Almost surely, 2^15051957561 is an apocalyptic number.

It is an amenable number.

15051957561 is a deficient number, since it is larger than the sum of its proper divisors (7014263031).

15051957561 is a wasteful number, since it uses less digits than its factorization.

15051957561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24961860 (or 24961857 counting only the distinct ones).

The product of its (nonzero) digits is 236250, while the sum is 45.

The spelling of 15051957561 in words is "fifteen billion, fifty-one million, nine hundred fifty-seven thousand, five hundred sixty-one".