3156457606621 has 6 divisors (see below), whose sum is σ = 3469494724766. Its totient is φ = 2869506915000.

The previous prime is 3156457606597. The next prime is 3156457606633. The reversal of 3156457606621 is 1266067546513.

It can be written as a sum of positive squares in only one way, i.e., 2951077336900 + 205380269721 = 1717870^2 + 453189^2 .

It is not a de Polignac number, because 3156457606621 - 2³⁹ = 2606701792733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156457606691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13043213130 + ... + 13043213371.

Almost surely, 2^{3156457606621} is an apocalyptic number.

It is an amenable number.

3156457606621 is a deficient number, since it is larger than the sum of its proper divisors (313037118145).

3156457606621 is a wasteful number, since it uses less digits than its factorization.

3156457606621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26086426523 (or 26086426512 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 52.

The spelling of 3156457606621 in words is "three trillion, one hundred fifty-six billion, four hundred fifty-seven million, six hundred six thousand, six hundred twenty-one".