868485523957 has 2 divisors, whose sum is σ = 868485523958. Its totient is φ = 868485523956.

The previous prime is 868485523921. The next prime is 868485524003. The reversal of 868485523957 is 759325584868.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 855419662321 + 13065861636 = 924889^2 + 114306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868485523957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868485521957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434242761978 + 434242761979.

It is an arithmetic number, because the mean of its divisors is an integer number (434242761979).

Almost surely, 2^868485523957 is an apocalyptic number.

It is an amenable number.

868485523957 is a deficient number, since it is larger than the sum of its proper divisors (1).

868485523957 is an equidigital number, since it uses as much as digits as its factorization.

868485523957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608000, while the sum is 70.

The spelling of 868485523957 in words is "eight hundred sixty-eight billion, four hundred eighty-five million, five hundred twenty-three thousand, nine hundred fifty-seven".