618455810172 has 12 divisors (see below), whose sum is σ = 1443063557096. Its totient is φ = 206151936720.

The previous prime is 618455810087. The next prime is 618455810207. The reversal of 618455810172 is 271018554816.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25768992079 + ... + 25768992102.

Almost surely, 2^618455810172 is an apocalyptic number.

It is an amenable number.

618455810172 is an abundant number, since it is smaller than the sum of its proper divisors (824607746924).

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

618455810172 is a wasteful number, since it uses less digits than its factorization.

618455810172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51537984188 (or 51537984186 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 48.

The spelling of 618455810172 in words is "six hundred eighteen billion, four hundred fifty-five million, eight hundred ten thousand, one hundred seventy-two".