49997257631 has 2 divisors, whose sum is σ = 49997257632. Its totient is φ = 49997257630.

The previous prime is 49997257619. The next prime is 49997257649. The reversal of 49997257631 is 13675279994.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49997257631 - 2¹⁰ = 49997256607 is a prime.

It is a super-2 number, since 2×49997257631² (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 (49997257231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24998628815 + 24998628816.

It is an arithmetic number, because the mean of its divisors is an integer number (24998628816).

Almost surely, 2^49997257631 is an apocalyptic number.

49997257631 is a deficient number, since it is larger than the sum of its proper divisors (1).

49997257631 is an equidigital number, since it uses as much as digits as its factorization.

49997257631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25719120, while the sum is 62.

The spelling of 49997257631 in words is "forty-nine billion, nine hundred ninety-seven million, two hundred fifty-seven thousand, six hundred thirty-one".