165704775552 has 48 divisors (see below), whose sum is σ = 476832755880. Its totient is φ = 55234924800.

The previous prime is 165704775499. The next prime is 165704775623. The reversal of 165704775552 is 255577407561.

165704775552 is a `hidden beast` number, since 1 + 6 + 5 + 70 + 477 + 55 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71919324 + ... + 71921627.

Almost surely, 2^165704775552 is an apocalyptic number.

165704775552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165704775552 is an abundant number, since it is smaller than the sum of its proper divisors (311127980328).

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

165704775552 is a wasteful number, since it uses less digits than its factorization.

165704775552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143840971 (or 143840956 counting only the distinct ones).

The product of its (nonzero) digits is 10290000, while the sum is 54.

The spelling of 165704775552 in words is "one hundred sixty-five billion, seven hundred four million, seven hundred seventy-five thousand, five hundred fifty-two".