50721177631 has 2 divisors, whose sum is σ = 50721177632. Its totient is φ = 50721177630.

The previous prime is 50721177629. The next prime is 50721177649. The reversal of 50721177631 is 13677112705.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 50721177631 - 2¹ = 50721177629 is a prime.

It is a super-2 number, since 2×50721177631² (a number of 22 digits) contains 22 as substring.

Together with 50721177629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50721177431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25360588815 + 25360588816.

It is an arithmetic number, because the mean of its divisors is an integer number (25360588816).

Almost surely, 2^50721177631 is an apocalyptic number.

50721177631 is a deficient number, since it is larger than the sum of its proper divisors (1).

50721177631 is an equidigital number, since it uses as much as digits as its factorization.

50721177631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The spelling of 50721177631 in words is "fifty billion, seven hundred twenty-one million, one hundred seventy-seven thousand, six hundred thirty-one".