86477489957 has 2 divisors, whose sum is σ = 86477489958. Its totient is φ = 86477489956.

The previous prime is 86477489947. The next prime is 86477489963. The reversal of 86477489957 is 75998477468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76468287841 + 10009202116 = 276529^2 + 100046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86477489957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86477489947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43238744978 + 43238744979.

It is an arithmetic number, because the mean of its divisors is an integer number (43238744979).

Almost surely, 2^86477489957 is an apocalyptic number.

It is an amenable number.

86477489957 is a deficient number, since it is larger than the sum of its proper divisors (1).

86477489957 is an equidigital number, since it uses as much as digits as its factorization.

86477489957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 853493760, while the sum is 74.

The spelling of 86477489957 in words is "eighty-six billion, four hundred seventy-seven million, four hundred eighty-nine thousand, nine hundred fifty-seven".