38787877631 has 2 divisors, whose sum is σ = 38787877632. Its totient is φ = 38787877630.

The previous prime is 38787877621. The next prime is 38787877651. The reversal of 38787877631 is 13677878783.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38787877631 - 2¹⁸ = 38787615487 is a prime.

It is a super-2 number, since 2×38787877631² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38787877621) 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, 19393938815 + 19393938816.

It is an arithmetic number, because the mean of its divisors is an integer number (19393938816).

Almost surely, 2^38787877631 is an apocalyptic number.

38787877631 is a deficient number, since it is larger than the sum of its proper divisors (1).

38787877631 is an equidigital number, since it uses as much as digits as its factorization.

38787877631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66382848, while the sum is 65.

The spelling of 38787877631 in words is "thirty-eight billion, seven hundred eighty-seven million, eight hundred seventy-seven thousand, six hundred thirty-one".