12961756900 has 36 divisors (see below), whose sum is σ = 28400112832. Its totient is φ = 5134361760.

The previous prime is 12961756897. The next prime is 12961756919. The reversal of 12961756900 is 965716921.

It is a super-2 number, since 2×12961756900² (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 11 ways as a sum of consecutive naturals, for example, 618912 + ... + 639511.

Almost surely, 2^12961756900 is an apocalyptic number.

12961756900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12961756900 is an abundant number, since it is smaller than the sum of its proper divisors (15438355932).

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

12961756900 is a wasteful number, since it uses less digits than its factorization.

12961756900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258540 (or 1258533 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 12961756900 in words is "twelve billion, nine hundred sixty-one million, seven hundred fifty-six thousand, nine hundred".