12972965508 has 30 divisors (see below), whose sum is σ = 33913895246. Its totient is φ = 4324321728.

The previous prime is 12972965477. The next prime is 12972965627. The reversal of 12972965508 is 80556927921.

12972965508 is a `hidden beast` number, since 1 + 2 + 9 + 72 + 9 + 65 + 508 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12619826244 + 353139264 = 112338^2 + 18792^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 20019685 + ... + 20020332.

Almost surely, 2^12972965508 is an apocalyptic number.

12972965508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12972965508 is an abundant number, since it is smaller than the sum of its proper divisors (20940929738).

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

12972965508 is a wasteful number, since it uses less digits than its factorization.

12972965508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40040033 (or 40040022 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 12972965508 in words is "twelve billion, nine hundred seventy-two million, nine hundred sixty-five thousand, five hundred eight".