5625781528129 has 9 divisors (see below), whose sum is σ = 6544295785377. Its totient is φ = 4822084221444.

The previous prime is 5625781528117. The next prime is 5625781528187. The reversal of 5625781528129 is 9218251875265.

It is a happy number.

The square root of 5625781528129 is 2371873.

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

It is not a de Polignac number, because 5625781528129 - 2²¹ = 5625779430977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5625781528189) 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, 16433692 + ... + 16772530.

It is an arithmetic number, because the mean of its divisors is an integer number (727143976153).

Almost surely, 2^{5625781528129} is an apocalyptic number.

5625781528129 is the 2371873-rd square number.

5625781528129 is the 1185937-th centered octagonal number.

It is an amenable number.

5625781528129 is a deficient number, since it is larger than the sum of its proper divisors (918514257248).

5625781528129 is an frugal number, since it uses more digits than its factorization.

5625781528129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677692 (or 338846 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 61.

The spelling of 5625781528129 in words is "five trillion, six hundred twenty-five billion, seven hundred eighty-one million, five hundred twenty-eight thousand, one hundred twenty-nine".