11756872531 has 2 divisors, whose sum is σ = 11756872532. Its totient is φ = 11756872530.

The previous prime is 11756872493. The next prime is 11756872583. The reversal of 11756872531 is 13527865711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11756872531 - 2³¹ = 9609388883 is a prime.

It is a super-2 number, since 2×11756872531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11756872031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5878436265 + 5878436266.

It is an arithmetic number, because the mean of its divisors is an integer number (5878436266).

Almost surely, 2^11756872531 is an apocalyptic number.

11756872531 is a deficient number, since it is larger than the sum of its proper divisors (1).

11756872531 is an equidigital number, since it uses as much as digits as its factorization.

11756872531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 46.

The spelling of 11756872531 in words is "eleven billion, seven hundred fifty-six million, eight hundred seventy-two thousand, five hundred thirty-one".