631637379117 has 24 divisors (see below), whose sum is σ = 922440980864. Its totient is φ = 416451992544.

The previous prime is 631637379097. The next prime is 631637379161. The reversal of 631637379117 is 711973736136.

It is not a de Polignac number, because 631637379117 - 2¹¹ = 631637377069 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 (631637372117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251688 + ... + 1151790.

Almost surely, 2^631637379117 is an apocalyptic number.

It is an amenable number.

631637379117 is a deficient number, since it is larger than the sum of its proper divisors (290803601747).

631637379117 is a wasteful number, since it uses less digits than its factorization.

631637379117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900969 (or 900966 counting only the distinct ones).

The product of its digits is 3000564, while the sum is 54.

The spelling of 631637379117 in words is "six hundred thirty-one billion, six hundred thirty-seven million, three hundred seventy-nine thousand, one hundred seventeen".