15920130625 has 75 divisors (see below), whose sum is σ = 23435555253. Its totient is φ = 10810674000.

The previous prime is 15920130623. The next prime is 15920130643. The reversal of 15920130625 is 52603102951.

The square root of 15920130625 is 126175.

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 1248138241 + 14671992384 = 35329^2 + 121128^2 .

It is not a de Polignac number, because 15920130625 - 2¹ = 15920130623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15920130623) by changing a digit.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 154564324 + ... + 154564426.

Almost surely, 2^15920130625 is an apocalyptic number.

15920130625 is the 126175-th square number.

15920130625 is the 63088-th centered octagonal number.

It is an amenable number.

15920130625 is a deficient number, since it is larger than the sum of its proper divisors (7515424628).

15920130625 is an frugal number, since it uses more digits than its factorization.

15920130625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

It can be divided in two parts, 159201 and 30625, that multiplied together give a square (4875530625 = 69825²).

The spelling of 15920130625 in words is "fifteen billion, nine hundred twenty million, one hundred thirty thousand, six hundred twenty-five".