1911954816 has 48 divisors (see below), whose sum is σ = 5501852460. Its totient is φ = 637317888.

The previous prime is 1911954797. The next prime is 1911954817. The reversal of 1911954816 is 6184591191.

1911954816 is a `hidden beast` number, since 1 + 91 + 1 + 9 + 548 + 16 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1911954817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 828690 + ... + 830993.

Almost surely, 2^1911954816 is an apocalyptic number.

1911954816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1911954816 is an abundant number, since it is smaller than the sum of its proper divisors (3589897644).

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

1911954816 is a wasteful number, since it uses less digits than its factorization.

1911954816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659703 (or 1659688 counting only the distinct ones).

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

The square root of 1911954816 is about 43725.9055480844. The cubic root of 1911954816 is about 1241.1545819198.

The spelling of 1911954816 in words is "one billion, nine hundred eleven million, nine hundred fifty-four thousand, eight hundred sixteen".