3126640561400 has 24 divisors (see below), whose sum is σ = 7269439305720. Its totient is φ = 1250656224480.

The previous prime is 3126640561381. The next prime is 3126640561441. The reversal of 3126640561400 is 41650466213.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7816601204 + ... + 7816601603.

It is an arithmetic number, because the mean of its divisors is an integer number (302893304405).

Almost surely, 2^{3126640561400} is an apocalyptic number.

It is an amenable number.

3126640561400 is an abundant number, since it is smaller than the sum of its proper divisors (4142798744320).

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

3126640561400 is a wasteful number, since it uses less digits than its factorization.

3126640561400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15633202823 (or 15633202814 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 3126640561400 in words is "three trillion, one hundred twenty-six billion, six hundred forty million, five hundred sixty-one thousand, four hundred".