11715840531 has 12 divisors (see below), whose sum is σ = 16932067152. Its totient is φ = 7806320496.

The previous prime is 11715840523. The next prime is 11715840589. The reversal of 11715840531 is 13504851711.

It is a happy number.

11715840531 is a `hidden beast` number, since 1 + 1 + 71 + 58 + 4 + 0 + 531 = 666.

It is not a de Polignac number, because 11715840531 - 2³ = 11715840523 is a prime.

It is a super-2 number, since 2×11715840531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11715842531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 335776 + ... + 369021.

It is an arithmetic number, because the mean of its divisors is an integer number (1411005596).

Almost surely, 2^11715840531 is an apocalyptic number.

11715840531 is a deficient number, since it is larger than the sum of its proper divisors (5216226621).

11715840531 is a wasteful number, since it uses less digits than its factorization.

11715840531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706650 (or 706647 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 11715840531 in words is "eleven billion, seven hundred fifteen million, eight hundred forty thousand, five hundred thirty-one".