38181650507857 has 2 divisors, whose sum is σ = 38181650507858. Its totient is φ = 38181650507856.

The previous prime is 38181650507849. The next prime is 38181650507933. The reversal of 38181650507857 is 75870505618183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23215205422656 + 14966445085201 = 4818216^2 + 3868649^2 .

It is a cyclic number.

It is not a de Polignac number, because 38181650507857 - 2³ = 38181650507849 is a prime.

It is not a weakly prime, because it can be changed into another prime (38181650507827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19090825253928 + 19090825253929.

It is an arithmetic number, because the mean of its divisors is an integer number (19090825253929).

Almost surely, 2^{38181650507857} is an apocalyptic number.

It is an amenable number.

38181650507857 is a deficient number, since it is larger than the sum of its proper divisors (1).

38181650507857 is an equidigital number, since it uses as much as digits as its factorization.

38181650507857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448000, while the sum is 64.

The spelling of 38181650507857 in words is "thirty-eight trillion, one hundred eighty-one billion, six hundred fifty million, five hundred seven thousand, eight hundred fifty-seven".