38731180621657 has 2 divisors, whose sum is σ = 38731180621658. Its totient is φ = 38731180621656.

The previous prime is 38731180621493. The next prime is 38731180621733. The reversal of 38731180621657 is 75612608113783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38091251019721 + 639929601936 = 6171811^2 + 799956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38731180621657 is a prime.

It is not a weakly prime, because it can be changed into another prime (38731180622657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19365590310828 + 19365590310829.

It is an arithmetic number, because the mean of its divisors is an integer number (19365590310829).

Almost surely, 2^{38731180621657} is an apocalyptic number.

It is an amenable number.

38731180621657 is a deficient number, since it is larger than the sum of its proper divisors (1).

38731180621657 is an equidigital number, since it uses as much as digits as its factorization.

38731180621657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 38731180621657 in words is "thirty-eight trillion, seven hundred thirty-one billion, one hundred eighty million, six hundred twenty-one thousand, six hundred fifty-seven".