55615530631 has 2 divisors, whose sum is σ = 55615530632. Its totient is φ = 55615530630.

The previous prime is 55615530611. The next prime is 55615530713. The reversal of 55615530631 is 13603551655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55615530631 - 2⁵ = 55615530599 is a prime.

It is a super-2 number, since 2×55615530631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55615530611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27807765315 + 27807765316.

It is an arithmetic number, because the mean of its divisors is an integer number (27807765316).

Almost surely, 2^55615530631 is an apocalyptic number.

55615530631 is a deficient number, since it is larger than the sum of its proper divisors (1).

55615530631 is an equidigital number, since it uses as much as digits as its factorization.

55615530631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 202500, while the sum is 40.

The spelling of 55615530631 in words is "fifty-five billion, six hundred fifteen million, five hundred thirty thousand, six hundred thirty-one".