12518854279491 has 32 divisors (see below), whose sum is σ = 19094571102208. Its totient is φ = 7146800514720.

The previous prime is 12518854279469. The next prime is 12518854279523. The reversal of 12518854279491 is 19497245881521.

It is not a de Polignac number, because 12518854279491 - 2¹¹ = 12518854277443 is a prime.

It is a super-2 number, since 2×12518854279491² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12518854279411) 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, 119398896 + ... + 119503698.

It is an arithmetic number, because the mean of its divisors is an integer number (596705346944).

Almost surely, 2^{12518854279491} is an apocalyptic number.

12518854279491 is a deficient number, since it is larger than the sum of its proper divisors (6575716822717).

12518854279491 is a wasteful number, since it uses less digits than its factorization.

12518854279491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110191.

The product of its digits is 58060800, while the sum is 66.

The spelling of 12518854279491 in words is "twelve trillion, five hundred eighteen billion, eight hundred fifty-four million, two hundred seventy-nine thousand, four hundred ninety-one".