1556794868 has 12 divisors (see below), whose sum is σ = 2867780160. Its totient is φ = 737429112.

The previous prime is 1556794867. The next prime is 1556794871. The reversal of 1556794868 is 8684976551.

It is a happy number.

It is a super-2 number, since 2×1556794868² = 4847220522062274848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556794867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10241996 + ... + 10242147.

It is an arithmetic number, because the mean of its divisors is an integer number (238981680).

Almost surely, 2^1556794868 is an apocalyptic number.

It is an amenable number.

1556794868 is a deficient number, since it is larger than the sum of its proper divisors (1310985292).

1556794868 is a wasteful number, since it uses less digits than its factorization.

1556794868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20484166 (or 20484164 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 59.

The square root of 1556794868 is about 39456.2399120849. The cubic root of 1556794868 is about 1158.9831725493.

The spelling of 1556794868 in words is "one billion, five hundred fifty-six million, seven hundred ninety-four thousand, eight hundred sixty-eight".