1854772777872 has 120 divisors (see below), whose sum is σ = 6244556701760. Its totient is φ = 502043754240.

The previous prime is 1854772777843. The next prime is 1854772777927. The reversal of 1854772777872 is 2787772774581.

1854772777872 is a `hidden beast` number, since 1 + 8 + 5 + 477 + 2 + 7 + 77 + 87 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1854772777872.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48403279 + ... + 48441582.

Almost surely, 2^{1854772777872} is an apocalyptic number.

1854772777872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1854772777872 is an abundant number, since it is smaller than the sum of its proper divisors (4389783923888).

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

1854772777872 is a wasteful number, since it uses less digits than its factorization.

1854772777872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96844901 (or 96844892 counting only the distinct ones).

The product of its digits is 602362880, while the sum is 72.

The spelling of 1854772777872 in words is "one trillion, eight hundred fifty-four billion, seven hundred seventy-two million, seven hundred seventy-seven thousand, eight hundred seventy-two".