631556054901 has 12 divisors (see below), whose sum is σ = 912289157728. Its totient is φ = 421018205544.

The previous prime is 631556054891. The next prime is 631556054933. The reversal of 631556054901 is 109450655136.

631556054901 is a `hidden beast` number, since 6 + 3 + 1 + 556 + 0 + 5 + 4 + 90 + 1 = 666.

It is not a de Polignac number, because 631556054901 - 2¹⁴ = 631556038517 is a prime.

It is a super-2 number, since 2×631556054901² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631556055901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1386865 + ... + 1785078.

Almost surely, 2^631556054901 is an apocalyptic number.

It is an amenable number.

631556054901 is a deficient number, since it is larger than the sum of its proper divisors (280733102827).

631556054901 is a wasteful number, since it uses less digits than its factorization.

631556054901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194072 (or 3194069 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 631556054901 in words is "six hundred thirty-one billion, five hundred fifty-six million, fifty-four thousand, nine hundred one".