16634550625 has 135 divisors (see below), whose sum is σ = 26980907877. Its totient is φ = 10214820000.

The previous prime is 16634550619. The next prime is 16634550629. The reversal of 16634550625 is 52605543661.

The square root of 16634550625 is 128975.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1304148769 + 15330401856 = 36113^2 + 123816^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16634550625 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16634550629) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 248276842 + ... + 248276908.

Almost surely, 2^16634550625 is an apocalyptic number.

16634550625 is the 128975-th square number.

16634550625 is the 64488-th centered octagonal number.

It is an amenable number.

16634550625 is a deficient number, since it is larger than the sum of its proper divisors (10346357252).

16634550625 is an frugal number, since it uses more digits than its factorization.

16634550625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 43.

The spelling of 16634550625 in words is "sixteen billion, six hundred thirty-four million, five hundred fifty thousand, six hundred twenty-five".