11612571261 has 16 divisors (see below), whose sum is σ = 15516748800. Its totient is φ = 7725074688.

The previous prime is 11612571241. The next prime is 11612571277. The reversal of 11612571261 is 16217521611.

It is not a de Polignac number, because 11612571261 - 2⁷ = 11612571133 is a prime.

It is a super-2 number, since 2×11612571261² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11612571241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5185380 + ... + 5187618.

It is an arithmetic number, because the mean of its divisors is an integer number (969796800).

Almost surely, 2^11612571261 is an apocalyptic number.

It is an amenable number.

11612571261 is a deficient number, since it is larger than the sum of its proper divisors (3904177539).

11612571261 is a wasteful number, since it uses less digits than its factorization.

11612571261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188.

The product of its digits is 5040, while the sum is 33.

The spelling of 11612571261 in words is "eleven billion, six hundred twelve million, five hundred seventy-one thousand, two hundred sixty-one".