38762521921 has 2 divisors, whose sum is σ = 38762521922. Its totient is φ = 38762521920.

The previous prime is 38762521913. The next prime is 38762521991. The reversal of 38762521921 is 12912526783.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37703930625 + 1058591296 = 194175^2 + 32536^2 .

It is a cyclic number.

It is not a de Polignac number, because 38762521921 - 2³ = 38762521913 is a prime.

It is not a weakly prime, because it can be changed into another prime (38762521991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19381260960 + 19381260961.

It is an arithmetic number, because the mean of its divisors is an integer number (19381260961).

Almost surely, 2^38762521921 is an apocalyptic number.

It is an amenable number.

38762521921 is a deficient number, since it is larger than the sum of its proper divisors (1).

38762521921 is an equidigital number, since it uses as much as digits as its factorization.

38762521921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 46.

The spelling of 38762521921 in words is "thirty-eight billion, seven hundred sixty-two million, five hundred twenty-one thousand, nine hundred twenty-one".