165445533856998 has 128 divisors (see below), whose sum is σ = 394070648572800. Its totient is φ = 51349257179136.

The previous prime is 165445533856973. The next prime is 165445533857017. The reversal of 165445533856998 is 899658335544561.

165445533856998 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 4 + 553 + 3 + 8 + 56 + 9 + 9 + 8 = 666.

165445533856998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6086911 + ... + 19181802.

It is an arithmetic number, because the mean of its divisors is an integer number (3078676941975).

Almost surely, 2^{165445533856998} is an apocalyptic number.

165445533856998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

165445533856998 is an abundant number, since it is smaller than the sum of its proper divisors (228625114715802).

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

165445533856998 is a wasteful number, since it uses less digits than its factorization.

165445533856998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25268903 (or 25268897 counting only the distinct ones).

The product of its digits is 16796160000, while the sum is 81.

The spelling of 165445533856998 in words is "one hundred sixty-five trillion, four hundred forty-five billion, five hundred thirty-three million, eight hundred fifty-six thousand, nine hundred ninety-eight".