72877555577831 has 2 divisors, whose sum is σ = 72877555577832. Its totient is φ = 72877555577830.

The previous prime is 72877555577791. The next prime is 72877555577833. The reversal of 72877555577831 is 13877555577827.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72877555577831 - 2¹⁸ = 72877555315687 is a prime.

It is a super-2 number, since 2×72877555577831² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 72877555577833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72877555577833) 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 as a sum of consecutive naturals, namely, 36438777788915 + 36438777788916.

It is an arithmetic number, because the mean of its divisors is an integer number (36438777788916).

Almost surely, 2^{72877555577831} is an apocalyptic number.

72877555577831 is a deficient number, since it is larger than the sum of its proper divisors (1).

72877555577831 is an equidigital number, since it uses as much as digits as its factorization.

72877555577831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4033680000, while the sum is 77.

The spelling of 72877555577831 in words is "seventy-two trillion, eight hundred seventy-seven billion, five hundred fifty-five million, five hundred seventy-seven thousand, eight hundred thirty-one".