16011645625 has 10 divisors (see below), whose sum is σ = 20008153154. Its totient is φ = 12809316000.

The previous prime is 16011645589. The next prime is 16011645631. The reversal of 16011645625 is 52654611061.

It can be written as a sum of positive squares in 5 ways, for example, as 4101633936 + 11910011689 = 64044^2 + 109133^2 .

It is not a de Polignac number, because 16011645625 - 2⁹ = 16011645113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12808692 + ... + 12809941.

Almost surely, 2^16011645625 is an apocalyptic number.

It is an amenable number.

16011645625 is a deficient number, since it is larger than the sum of its proper divisors (3996507529).

16011645625 is an frugal number, since it uses more digits than its factorization.

16011645625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25618653 (or 25618638 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 16011645625 in words is "sixteen billion, eleven million, six hundred forty-five thousand, six hundred twenty-five".