11516398531 has 8 divisors (see below), whose sum is σ = 12566201328. Its totient is φ = 10467072000.

The previous prime is 11516398501. The next prime is 11516398547. The reversal of 11516398531 is 13589361511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11516398531 - 2²⁵ = 11482844099 is a prime.

It is a super-2 number, since 2×11516398531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11516398501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67530 + ... + 166111.

It is an arithmetic number, because the mean of its divisors is an integer number (1570775166).

Almost surely, 2^11516398531 is an apocalyptic number.

11516398531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11516398531 is a deficient number, since it is larger than the sum of its proper divisors (1049802797).

11516398531 is a wasteful number, since it uses less digits than its factorization.

11516398531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238133.

The product of its digits is 97200, while the sum is 43.

The spelling of 11516398531 in words is "eleven billion, five hundred sixteen million, three hundred ninety-eight thousand, five hundred thirty-one".