2678665292864 has 56 divisors (see below), whose sum is σ = 5858482149408. Its totient is φ = 1205022781440.

The previous prime is 2678665292857. The next prime is 2678665292867. The reversal of 2678665292864 is 4682925668762.

It is not an unprimeable number, because it can be changed into a prime (2678665292867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19544714 + ... + 19681289.

It is an arithmetic number, because the mean of its divisors is an integer number (104615752668).

Almost surely, 2^{2678665292864} is an apocalyptic number.

It is an amenable number.

2678665292864 is an abundant number, since it is smaller than the sum of its proper divisors (3179816856544).

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

2678665292864 is a wasteful number, since it uses less digits than its factorization.

2678665292864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39226123 (or 39226113 counting only the distinct ones).

The product of its digits is 836075520, while the sum is 71.

The spelling of 2678665292864 in words is "two trillion, six hundred seventy-eight billion, six hundred sixty-five million, two hundred ninety-two thousand, eight hundred sixty-four".