16546191425 has 36 divisors (see below), whose sum is σ = 21376691700. Its totient is φ = 12703837440.

The previous prime is 16546191413. The next prime is 16546191479. The reversal of 16546191425 is 52419164561.

16546191425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 128632²+1.

It can be written as a sum of positive squares in 18 ways, for example, as 4378336561 + 12167854864 = 66169^2 + 110308^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16546191425 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3635051 + ... + 3639599.

Almost surely, 2^16546191425 is an apocalyptic number.

It is an amenable number.

16546191425 is a deficient number, since it is larger than the sum of its proper divisors (4830500275).

16546191425 is a wasteful number, since it uses less digits than its factorization.

16546191425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790 (or 4756 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The spelling of 16546191425 in words is "sixteen billion, five hundred forty-six million, one hundred ninety-one thousand, four hundred twenty-five".