12540375402 has 96 divisors (see below), whose sum is σ = 27559284480. Its totient is φ = 3798990720.

The previous prime is 12540375343. The next prime is 12540375413. The reversal of 12540375402 is 20457304521.

It is a super-2 number, since 2×12540375402² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11368783 + ... + 11369885.

It is an arithmetic number, because the mean of its divisors is an integer number (287075880).

Almost surely, 2^12540375402 is an apocalyptic number.

12540375402 is an abundant number, since it is smaller than the sum of its proper divisors (15018909078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12540375402 is a wasteful number, since it uses less digits than its factorization.

12540375402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 33.

Adding to 12540375402 its reverse (20457304521), we get a palindrome (32997679923).

The spelling of 12540375402 in words is "twelve billion, five hundred forty million, three hundred seventy-five thousand, four hundred two".