16122650625 has 45 divisors (see below), whose sum is σ = 29118225279. Its totient is φ = 8593668000.

The previous prime is 16122650623. The next prime is 16122650657. The reversal of 16122650625 is 52605622161.

The square root of 16122650625 is 126975.

It is a perfect power (a square), and thus also a powerful number.

16122650625 is a `hidden beast` number, since 1 + 6 + 1 + 2 + 26 + 5 + 0 + 625 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 13888386801 + 2234263824 = 117849^2 + 47268^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 16122650625 - 2¹ = 16122650623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16122650625.

It is not an unprimeable number, because it can be changed into a prime (16122650623) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 9522279 + ... + 9523971.

Almost surely, 2^16122650625 is an apocalyptic number.

16122650625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16122650625 is the 126975-th square number.

16122650625 is the 63488-th centered octagonal number.

It is an amenable number.

16122650625 is a deficient number, since it is larger than the sum of its proper divisors (12995574654).

16122650625 is an frugal number, since it uses more digits than its factorization.

16122650625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3412 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Multiplying 16122650625 by its sum of digits (36), we get a square (580415422500 = 761850²).

The spelling of 16122650625 in words is "sixteen billion, one hundred twenty-two million, six hundred fifty thousand, six hundred twenty-five".