32507820857 has 2 divisors, whose sum is σ = 32507820858. Its totient is φ = 32507820856.

The previous prime is 32507820827. The next prime is 32507820859. The reversal of 32507820857 is 75802870523.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19594680361 + 12913140496 = 139981^2 + 113636^2 .

It is a cyclic number.

It is not a de Polignac number, because 32507820857 - 2⁸ = 32507820601 is a prime.

Together with 32507820859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (32507820859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16253910428 + 16253910429.

It is an arithmetic number, because the mean of its divisors is an integer number (16253910429).

Almost surely, 2^32507820857 is an apocalyptic number.

It is an amenable number.

32507820857 is a deficient number, since it is larger than the sum of its proper divisors (1).

32507820857 is an equidigital number, since it uses as much as digits as its factorization.

32507820857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 32507820857 in words is "thirty-two billion, five hundred seven million, eight hundred twenty thousand, eight hundred fifty-seven".