1851640184968 has 32 divisors (see below), whose sum is σ = 3992142749760. Its totient is φ = 788691608640.

The previous prime is 1851640184929. The next prime is 1851640184981. The reversal of 1851640184968 is 8694810461581.

It is a super-2 number, since 2×1851640184968² (a number of 25 digits) contains 22 as substring.

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, 101417263 + ... + 101435518.

It is an arithmetic number, because the mean of its divisors is an integer number (124754460930).

Almost surely, 2^{1851640184968} is an apocalyptic number.

It is an amenable number.

1851640184968 is an abundant number, since it is smaller than the sum of its proper divisors (2140502564792).

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

1851640184968 is a wasteful number, since it uses less digits than its factorization.

1851640184968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202852957 (or 202852953 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 61.

The spelling of 1851640184968 in words is "one trillion, eight hundred fifty-one billion, six hundred forty million, one hundred eighty-four thousand, nine hundred sixty-eight".