1949111568 has 60 divisors (see below), whose sum is σ = 5581678960. Its totient is φ = 634592448.

The previous prime is 1949111543. The next prime is 1949111579. The reversal of 1949111568 is 8651119491.

1949111568 is a `hidden beast` number, since 1 + 9 + 491 + 1 + 156 + 8 = 666.

It is a super-2 number, since 2×1949111568² = 7598071809022837248, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151198 + ... + 163581.

Almost surely, 2^1949111568 is an apocalyptic number.

1949111568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1949111568 is an abundant number, since it is smaller than the sum of its proper divisors (3632567392).

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

1949111568 is a wasteful number, since it uses less digits than its factorization.

1949111568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314836 (or 314827 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The square root of 1949111568 is about 44148.7436740843. The cubic root of 1949111568 is about 1249.1432140418.

The spelling of 1949111568 in words is "one billion, nine hundred forty-nine million, one hundred eleven thousand, five hundred sixty-eight".