16404255651625 has 16 divisors (see below), whose sum is σ = 20486620522368. Its totient is φ = 13114359990000.

The previous prime is 16404255651601. The next prime is 16404255651647. The reversal of 16404255651625 is 52615655240461.

It is not a de Polignac number, because 16404255651625 - 2⁴¹ = 14205232396073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45040557 + ... + 45403306.

It is an arithmetic number, because the mean of its divisors is an integer number (1280413782648).

Almost surely, 2^{16404255651625} is an apocalyptic number.

It is an amenable number.

16404255651625 is a deficient number, since it is larger than the sum of its proper divisors (4082364870743).

16404255651625 is an equidigital number, since it uses as much as digits as its factorization.

16404255651625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90445329 (or 90445319 counting only the distinct ones).

The product of its (nonzero) digits is 8640000, while the sum is 52.

The spelling of 16404255651625 in words is "sixteen trillion, four hundred four billion, two hundred fifty-five million, six hundred fifty-one thousand, six hundred twenty-five".