1911125664 has 120 divisors (see below), whose sum is σ = 6423566688. Its totient is φ = 546030720.

The previous prime is 1911125663. The next prime is 1911125677. The reversal of 1911125664 is 4665211191.

1911125664 is a `hidden beast` number, since 1 + 91 + 1 + 1 + 2 + 566 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1911125663) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34522 + ... + 70809.

Almost surely, 2^1911125664 is an apocalyptic number.

1911125664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1911125664 is an abundant number, since it is smaller than the sum of its proper divisors (4512441024).

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

1911125664 is a wasteful number, since it uses less digits than its factorization.

1911125664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105360 (or 105343 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1911125664 is about 43716.4232754694. The cubic root of 1911125664 is about 1240.9751399870.

The spelling of 1911125664 in words is "one billion, nine hundred eleven million, one hundred twenty-five thousand, six hundred sixty-four".