39675908557 has 2 divisors, whose sum is σ = 39675908558. Its totient is φ = 39675908556.

The previous prime is 39675908537. The next prime is 39675908563. The reversal of 39675908557 is 75580957693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34620556356 + 5055352201 = 186066^2 + 71101^2 .

It is a cyclic number.

It is not a de Polignac number, because 39675908557 - 2⁷ = 39675908429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39675908537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19837954278 + 19837954279.

It is an arithmetic number, because the mean of its divisors is an integer number (19837954279).

Almost surely, 2^39675908557 is an apocalyptic number.

It is an amenable number.

39675908557 is a deficient number, since it is larger than the sum of its proper divisors (1).

39675908557 is an equidigital number, since it uses as much as digits as its factorization.

39675908557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442000, while the sum is 64.

The spelling of 39675908557 in words is "thirty-nine billion, six hundred seventy-five million, nine hundred eight thousand, five hundred fifty-seven".