678864133291 has 4 divisors (see below), whose sum is σ = 678867428800. Its totient is φ = 678860837784.

The previous prime is 678864133193. The next prime is 678864133301. The reversal of 678864133291 is 192331468876.

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

It is a cyclic number.

It is not a de Polignac number, because 678864133291 - 2³⁵ = 644504394923 is a prime.

It is a super-2 number, since 2×678864133291² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678864133691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316571 + ... + 1758148.

It is an arithmetic number, because the mean of its divisors is an integer number (169716857200).

Almost surely, 2^678864133291 is an apocalyptic number.

678864133291 is a deficient number, since it is larger than the sum of its proper divisors (3295509).

678864133291 is a wasteful number, since it uses less digits than its factorization.

678864133291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295508.

The product of its digits is 10450944, while the sum is 58.

The spelling of 678864133291 in words is "six hundred seventy-eight billion, eight hundred sixty-four million, one hundred thirty-three thousand, two hundred ninety-one".