1913794664 has 16 divisors (see below), whose sum is σ = 3588852420. Its totient is φ = 956767360.

The previous prime is 1913794657. The next prime is 1913794721. The reversal of 1913794664 is 4664973191.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1861232164 + 52562500 = 43142^2 + 7250^2 .

It is a super-2 number, since 2×1913794664² = 7325220031909745792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79574 + ... + 100794.

Almost surely, 2^1913794664 is an apocalyptic number.

It is an amenable number.

1913794664 is a deficient number, since it is larger than the sum of its proper divisors (1675057756).

1913794664 is a wasteful number, since it uses less digits than its factorization.

1913794664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32500 (or 32496 counting only the distinct ones).

The product of its digits is 979776, while the sum is 50.

The square root of 1913794664 is about 43746.9389100540. The cubic root of 1913794664 is about 1241.5525696540.

The spelling of 1913794664 in words is "one billion, nine hundred thirteen million, seven hundred ninety-four thousand, six hundred sixty-four".