16544604025 has 12 divisors (see below), whose sum is σ = 20696863932. Its totient is φ = 13118551040.

The previous prime is 16544603963. The next prime is 16544604049. The reversal of 16544604025 is 52040644561.

It can be written as a sum of positive squares in 6 ways, for example, as 6446162944 + 10098441081 = 80288^2 + 100491^2 .

It is not a de Polignac number, because 16544604025 - 2²¹ = 16542506873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2925424 + ... + 2931073.

It is an arithmetic number, because the mean of its divisors is an integer number (1724738661).

Almost surely, 2^16544604025 is an apocalyptic number.

It is an amenable number.

16544604025 is a deficient number, since it is larger than the sum of its proper divisors (4152259907).

16544604025 is a wasteful number, since it uses less digits than its factorization.

16544604025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856620 (or 5856615 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 16544604025 in words is "sixteen billion, five hundred forty-four million, six hundred four thousand, twenty-five".