16845562978 has 8 divisors (see below), whose sum is σ = 26139666780. Its totient is φ = 8132340720.

The previous prime is 16845562969. The next prime is 16845562999. The reversal of 16845562978 is 87926554861.

It can be written as a sum of positive squares in 2 ways, for example, as 16662420889 + 183142089 = 129083^2 + 13533^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145220313 + ... + 145220428.

Almost surely, 2^16845562978 is an apocalyptic number.

16845562978 is a deficient number, since it is larger than the sum of its proper divisors (9294103802).

16845562978 is a wasteful number, since it uses less digits than its factorization.

16845562978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290440772.

The product of its digits is 29030400, while the sum is 61.

The spelling of 16845562978 in words is "sixteen billion, eight hundred forty-five million, five hundred sixty-two thousand, nine hundred seventy-eight".