16604217545 has 8 divisors (see below), whose sum is σ = 19955208840. Its totient is φ = 13263275520.

The previous prime is 16604217529. The next prime is 16604217547. The reversal of 16604217545 is 54571240661.

It can be written as a sum of positive squares in 4 ways, for example, as 3808988089 + 12795229456 = 61717^2 + 113116^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16604217545 - 2⁴ = 16604217529 is a prime.

It is a super-3 number, since 3×16604217545³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (16604217547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508680 + ... + 2515289.

It is an arithmetic number, because the mean of its divisors is an integer number (2494401105).

Almost surely, 2^16604217545 is an apocalyptic number.

It is an amenable number.

16604217545 is a deficient number, since it is larger than the sum of its proper divisors (3350991295).

16604217545 is an equidigital number, since it uses as much as digits as its factorization.

16604217545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024635.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 16604217545 in words is "sixteen billion, six hundred four million, two hundred seventeen thousand, five hundred forty-five".