38072775421 has 2 divisors, whose sum is σ = 38072775422. Its totient is φ = 38072775420.

The previous prime is 38072775407. The next prime is 38072775443. The reversal of 38072775421 is 12457727083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26297487225 + 11775288196 = 162165^2 + 108514^2 .

It is a cyclic number.

It is not a de Polignac number, because 38072775421 - 2²³ = 38064386813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38072775821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19036387710 + 19036387711.

It is an arithmetic number, because the mean of its divisors is an integer number (19036387711).

Almost surely, 2^38072775421 is an apocalyptic number.

It is an amenable number.

38072775421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38072775421 is an equidigital number, since it uses as much as digits as its factorization.

38072775421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 46.

The spelling of 38072775421 in words is "thirty-eight billion, seventy-two million, seven hundred seventy-five thousand, four hundred twenty-one".