1918705164 has 24 divisors (see below), whose sum is σ = 4505498928. Its totient is φ = 635494080.

The previous prime is 1918705127. The next prime is 1918705171. The reversal of 1918705164 is 4615078191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507327 + ... + 511094.

It is an arithmetic number, because the mean of its divisors is an integer number (187729122).

Almost surely, 2^1918705164 is an apocalyptic number.

It is an amenable number.

1918705164 is an abundant number, since it is smaller than the sum of its proper divisors (2586793764).

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

1918705164 is a wasteful number, since it uses less digits than its factorization.

1918705164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018585 (or 1018583 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1918705164 is about 43803.0268817122. The cubic root of 1918705164 is about 1242.6135397919.

The spelling of 1918705164 in words is "one billion, nine hundred eighteen million, seven hundred five thousand, one hundred sixty-four".