15627250081 has 9 divisors (see below), whose sum is σ = 16022954073. Its totient is φ = 15241097280.

The previous prime is 15627250063. The next prime is 15627250091. The reversal of 15627250081 is 18005272651.

The square root of 15627250081 is 125009.

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

It can be written as a sum of positive squares in 4 ways, for example, as 11276528481 + 4350721600 = 106191^2 + 65960^2 .

It is not a de Polignac number, because 15627250081 - 2⁵ = 15627250049 is a prime.

It is a super-2 number, since 2×15627250081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15627250081.

It is not an unprimeable number, because it can be changed into a prime (15627250021) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5123845 + ... + 5126893.

Almost surely, 2^15627250081 is an apocalyptic number.

15627250081 is the 125009-th square number.

15627250081 is the 62505-th centered octagonal number.

It is an amenable number.

15627250081 is a deficient number, since it is larger than the sum of its proper divisors (395703992).

15627250081 is an frugal number, since it uses more digits than its factorization.

15627250081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180 (or 3090 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 15627250081 in words is "fifteen billion, six hundred twenty-seven million, two hundred fifty thousand, eighty-one".