6939991069656 has 32 divisors (see below), whose sum is σ = 17370317675760. Its totient is φ = 2310618356352.

The previous prime is 6939991069601. The next prime is 6939991069709. The reversal of 6939991069656 is 6569601999396.

It is a congruent number.

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, 169479115 + ... + 169520058.

Almost surely, 2^{6939991069656} is an apocalyptic number.

It is an amenable number.

6939991069656 is an abundant number, since it is smaller than the sum of its proper divisors (10430326606104).

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

6939991069656 is a wasteful number, since it uses less digits than its factorization.

6939991069656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339000035 (or 339000031 counting only the distinct ones).

The product of its (nonzero) digits is 1147912560, while the sum is 78.

The spelling of 6939991069656 in words is "six trillion, nine hundred thirty-nine billion, nine hundred ninety-one million, sixty-nine thousand, six hundred fifty-six".