1920691656 has 64 divisors (see below), whose sum is σ = 5745667200. Its totient is φ = 590981184.

The previous prime is 1920691579. The next prime is 1920691667. The reversal of 1920691656 is 6561960291.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339196 + ... + 344811.

It is an arithmetic number, because the mean of its divisors is an integer number (89776050).

Almost surely, 2^1920691656 is an apocalyptic number.

It is an amenable number.

1920691656 is an abundant number, since it is smaller than the sum of its proper divisors (3824975544).

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

1920691656 is a wasteful number, since it uses less digits than its factorization.

1920691656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684035 (or 684025 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1920691656 is about 43825.6962979483. The cubic root of 1920691656 is about 1243.0422300198.

The spelling of 1920691656 in words is "one billion, nine hundred twenty million, six hundred ninety-one thousand, six hundred fifty-six".