85870852957 has 2 divisors, whose sum is σ = 85870852958. Its totient is φ = 85870852956.

The previous prime is 85870852933. The next prime is 85870852993. The reversal of 85870852957 is 75925807858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53478412516 + 32392440441 = 231254^2 + 179979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85870852957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85870852357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42935426478 + 42935426479.

It is an arithmetic number, because the mean of its divisors is an integer number (42935426479).

Almost surely, 2^85870852957 is an apocalyptic number.

It is an amenable number.

85870852957 is a deficient number, since it is larger than the sum of its proper divisors (1).

85870852957 is an equidigital number, since it uses as much as digits as its factorization.

85870852957 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 85870852957 in words is "eighty-five billion, eight hundred seventy million, eight hundred fifty-two thousand, nine hundred fifty-seven".