16605415044 has 45 divisors (see below), whose sum is σ = 43415899527. Its totient is φ = 5534365176.

The previous prime is 16605415039. The next prime is 16605415063. The reversal of 16605415044 is 44051450661.

The square root of 16605415044 is 128862.

It is a perfect power (a square), and thus also a powerful number.

16605415044 is a `hidden beast` number, since 1 + 6 + 60 + 541 + 50 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 2315937 + ... + 2323095.

Almost surely, 2^16605415044 is an apocalyptic number.

16605415044 is the 128862-nd square number.

It is an amenable number.

16605415044 is an abundant number, since it is smaller than the sum of its proper divisors (26810484483).

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

16605415044 is an frugal number, since it uses more digits than its factorization.

16605415044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14334 (or 7164 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Multiplying 16605415044 by its sum of digits (36), we get a square (597794941584 = 773172²).

16605415044 divided by its sum of digits (36) gives a square (461261529 = 21477²).

Multiplying 16605415044 by its product of nonzero digits (57600), we get a square (956471906534400 = 30926880²).

It can be divided in two parts, 16605 and 415044, that added together give a square (431649 = 657²).

The spelling of 16605415044 in words is "sixteen billion, six hundred five million, four hundred fifteen thousand, forty-four".