11516774261 has 4 divisors (see below), whose sum is σ = 11517504000. Its totient is φ = 11516044524.

The previous prime is 11516774233. The next prime is 11516774267. The reversal of 11516774261 is 16247761511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11516774261 - 2³⁰ = 10443032437 is a prime.

It is a super-2 number, since 2×11516774261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11516774267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340661 + ... + 372938.

It is an arithmetic number, because the mean of its divisors is an integer number (2879376000).

Almost surely, 2^11516774261 is an apocalyptic number.

It is an amenable number.

11516774261 is a deficient number, since it is larger than the sum of its proper divisors (729739).

11516774261 is an equidigital number, since it uses as much as digits as its factorization.

11516774261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729738.

The product of its digits is 70560, while the sum is 41.

The spelling of 11516774261 in words is "eleven billion, five hundred sixteen million, seven hundred seventy-four thousand, two hundred sixty-one".