16604437145520 has 80 divisors (see below), whose sum is σ = 58827148750080. Its totient is φ = 3795299918592.

The previous prime is 16604437145503. The next prime is 16604437145533. The reversal of 16604437145520 is 2554173440661.

16604437145520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 16604437145520.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4941795090 + ... + 4941798449.

It is an arithmetic number, because the mean of its divisors is an integer number (735339359376).

Almost surely, 2^{16604437145520} is an apocalyptic number.

16604437145520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16604437145520 is an abundant number, since it is smaller than the sum of its proper divisors (42222711604560).

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

16604437145520 is a wasteful number, since it uses less digits than its factorization.

16604437145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9883593562 (or 9883593556 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 16604437145520 in words is "sixteen trillion, six hundred four billion, four hundred thirty-seven million, one hundred forty-five thousand, five hundred twenty".