113406631261 has 32 divisors (see below), whose sum is σ = 142109614080. Its totient is φ = 87920260800.

The previous prime is 113406631199. The next prime is 113406631279. The reversal of 113406631261 is 162136604311.

It is a cyclic number.

It is not a de Polignac number, because 113406631261 - 2⁷ = 113406631133 is a prime.

It is a super-2 number, since 2×113406631261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113406631561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12793971 + ... + 12802831.

It is an arithmetic number, because the mean of its divisors is an integer number (4440925440).

Almost surely, 2^113406631261 is an apocalyptic number.

113406631261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

113406631261 is a deficient number, since it is larger than the sum of its proper divisors (28702982819).

113406631261 is a wasteful number, since it uses less digits than its factorization.

113406631261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9705.

The product of its (nonzero) digits is 15552, while the sum is 34.

The spelling of 113406631261 in words is "one hundred thirteen billion, four hundred six million, six hundred thirty-one thousand, two hundred sixty-one".