39572696857 has 2 divisors, whose sum is σ = 39572696858. Its totient is φ = 39572696856.

The previous prime is 39572696809. The next prime is 39572696887. The reversal of 39572696857 is 75869627593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25646100736 + 13926596121 = 160144^2 + 118011^2 .

It is a cyclic number.

It is not a de Polignac number, because 39572696857 - 2⁷ = 39572696729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39572696792 and 39572696801.

It is not a weakly prime, because it can be changed into another prime (39572696887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19786348428 + 19786348429.

It is an arithmetic number, because the mean of its divisors is an integer number (19786348429).

Almost surely, 2^39572696857 is an apocalyptic number.

It is an amenable number.

39572696857 is a deficient number, since it is larger than the sum of its proper divisors (1).

39572696857 is an equidigital number, since it uses as much as digits as its factorization.

39572696857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171460800, while the sum is 67.

The spelling of 39572696857 in words is "thirty-nine billion, five hundred seventy-two million, six hundred ninety-six thousand, eight hundred fifty-seven".