1855516872 has 32 divisors (see below), whose sum is σ = 5060501280. Its totient is φ = 562277760.

The previous prime is 1855516843. The next prime is 1855516879. The reversal of 1855516872 is 2786155581.

It is not an unprimeable number, because it can be changed into a prime (1855516879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3513973 + ... + 3514500.

It is an arithmetic number, because the mean of its divisors is an integer number (158140665).

Almost surely, 2^1855516872 is an apocalyptic number.

1855516872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1855516872 is an abundant number, since it is smaller than the sum of its proper divisors (3204984408).

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

1855516872 is a wasteful number, since it uses less digits than its factorization.

1855516872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028493 (or 7028489 counting only the distinct ones).

The product of its digits is 672000, while the sum is 48.

The square root of 1855516872 is about 43075.7109285500. The cubic root of 1855516872 is about 1228.8200886727.

The spelling of 1855516872 in words is "one billion, eight hundred fifty-five million, five hundred sixteen thousand, eight hundred seventy-two".