6940809864 has 32 divisors (see below), whose sum is σ = 19280028000. Its totient is φ = 2313603216.

The previous prime is 6940809853. The next prime is 6940809893. The reversal of 6940809864 is 4689080496.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 6940809864.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16066474 + ... + 16066905.

It is an arithmetic number, because the mean of its divisors is an integer number (602500875).

Almost surely, 2^6940809864 is an apocalyptic number.

It is an amenable number.

6940809864 is an abundant number, since it is smaller than the sum of its proper divisors (12339218136).

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

6940809864 is a wasteful number, since it uses less digits than its factorization.

6940809864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32133394 (or 32133384 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The square root of 6940809864 is about 83311.5229965219. The cubic root of 6940809864 is about 1907.5241683573.

The spelling of 6940809864 in words is "six billion, nine hundred forty million, eight hundred nine thousand, eight hundred sixty-four".