82115402258 has 6 divisors (see below), whose sum is σ = 123173711271. Its totient is φ = 41057498502.

The previous prime is 82115402251. The next prime is 82115402381. The reversal of 82115402258 is 85220451128.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 41057701129 + 41057701129 = 202627^2 + 202627^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=202627.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82115402251) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 303941 + ... + 506567.

Almost surely, 2^82115402258 is an apocalyptic number.

82115402258 is a deficient number, since it is larger than the sum of its proper divisors (41058309013).

82115402258 is an frugal number, since it uses more digits than its factorization.

82115402258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405256 (or 202629 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The spelling of 82115402258 in words is "eighty-two billion, one hundred fifteen million, four hundred two thousand, two hundred fifty-eight".