11761612731 has 36 divisors (see below), whose sum is σ = 19656724360. Its totient is φ = 6753067200.

The previous prime is 11761612717. The next prime is 11761612777. The reversal of 11761612731 is 13721616711.

It is a happy number.

11761612731 is a `hidden beast` number, since 1 + 1 + 7 + 6 + 1 + 612 + 7 + 31 = 666.

It is not a de Polignac number, because 11761612731 - 2¹¹ = 11761610683 is a prime.

It is a super-2 number, since 2×11761612731² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11761612631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 263530 + ... + 304911.

Almost surely, 2^11761612731 is an apocalyptic number.

11761612731 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11761612731 is a deficient number, since it is larger than the sum of its proper divisors (7895111629).

11761612731 is a wasteful number, since it uses less digits than its factorization.

11761612731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568488 (or 568474 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The spelling of 11761612731 in words is "eleven billion, seven hundred sixty-one million, six hundred twelve thousand, seven hundred thirty-one".