86280390257 has 4 divisors (see below), whose sum is σ = 86524810980. Its totient is φ = 86035969536.

The previous prime is 86280390239. The next prime is 86280390269. The reversal of 86280390257 is 75209308268.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58082928016 + 28197462241 = 241004^2 + 167921^2 .

It is a cyclic number.

It is not a de Polignac number, because 86280390257 - 2²² = 86276195953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86280390277) 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 in 3 ways as a sum of consecutive naturals, for example, 122209832 + ... + 122210537.

It is an arithmetic number, because the mean of its divisors is an integer number (21631202745).

Almost surely, 2^86280390257 is an apocalyptic number.

It is an amenable number.

86280390257 is a deficient number, since it is larger than the sum of its proper divisors (244420723).

86280390257 is a wasteful number, since it uses less digits than its factorization.

86280390257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244420722.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 86280390257 in words is "eighty-six billion, two hundred eighty million, three hundred ninety thousand, two hundred fifty-seven".