12879937540 has 24 divisors (see below), whose sum is σ = 27778893912. Its totient is φ = 5012732160.

The previous prime is 12879937523. The next prime is 12879937549. The reversal of 12879937540 is 4573997821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 601524676 + 12278412864 = 24526^2 + 110808^2 .

It is not an unprimeable number, because it can be changed into a prime (12879937549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8701921 + ... + 8703400.

It is an arithmetic number, because the mean of its divisors is an integer number (1157453913).

Almost surely, 2^12879937540 is an apocalyptic number.

12879937540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12879937540 is an abundant number, since it is smaller than the sum of its proper divisors (14898956372).

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

12879937540 is a wasteful number, since it uses less digits than its factorization.

12879937540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405367 (or 17405365 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 12879937540 in words is "twelve billion, eight hundred seventy-nine million, nine hundred thirty-seven thousand, five hundred forty".