8257878864 has 30 divisors (see below), whose sum is σ = 23110591946. Its totient is φ = 2752626240.

The previous prime is 8257878851. The next prime is 8257878907. The reversal of 8257878864 is 4688787528.

It can be written as a sum of positive squares in only one way, i.e., 8173606464 + 84272400 = 90408^2 + 9180^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 28673047 + ... + 28673334.

Almost surely, 2^8257878864 is an apocalyptic number.

It is an amenable number.

8257878864 is an abundant number, since it is smaller than the sum of its proper divisors (14852713082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8257878864 is a wasteful number, since it uses less digits than its factorization.

8257878864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57346395 (or 57346386 counting only the distinct ones).

The product of its digits is 48168960, while the sum is 63.

The square root of 8257878864 is about 90872.8719915905. The cubic root of 8257878864 is about 2021.2630456623.

The spelling of 8257878864 in words is "eight billion, two hundred fifty-seven million, eight hundred seventy-eight thousand, eight hundred sixty-four".