631200257613 has 10 divisors (see below), whose sum is σ = 942904088654. Its totient is φ = 420800171688.

The previous prime is 631200257563. The next prime is 631200257617. The reversal of 631200257613 is 316752002136.

631200257613 is a `hidden beast` number, since 6 + 3 + 12 + 0 + 0 + 25 + 7 + 613 = 666.

It can be written as a sum of positive squares in only one way, i.e., 531992266884 + 99207990729 = 729378^2 + 314973^2 .

It is not a de Polignac number, because 631200257613 - 2⁹ = 631200257101 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 (631200257617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3896297806 + ... + 3896297967.

Almost surely, 2^631200257613 is an apocalyptic number.

It is an amenable number.

631200257613 is a deficient number, since it is larger than the sum of its proper divisors (311703831041).

631200257613 is an equidigital number, since it uses as much as digits as its factorization.

631200257613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7792595785 (or 7792595776 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

Adding to 631200257613 its reverse (316752002136), we get a palindrome (947952259749).

The spelling of 631200257613 in words is "six hundred thirty-one billion, two hundred million, two hundred fifty-seven thousand, six hundred thirteen".