165454811520 has 64 divisors (see below), whose sum is σ = 527387217840. Its totient is φ = 44121282560.

The previous prime is 165454811503. The next prime is 165454811539. The reversal of 165454811520 is 25118454561.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

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, 43085271 + ... + 43089110.

Almost surely, 2^165454811520 is an apocalyptic number.

165454811520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165454811520 is an abundant number, since it is smaller than the sum of its proper divisors (361932406320).

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

165454811520 is an equidigital number, since it uses as much as digits as its factorization.

165454811520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86174403 (or 86174391 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 42.

The spelling of 165454811520 in words is "one hundred sixty-five billion, four hundred fifty-four million, eight hundred eleven thousand, five hundred twenty".