5156691597225 has 351 divisors, whose sum is σ = 11284162314357. Its totient is φ = 2330857710720.

The previous prime is 5156691597217. The next prime is 5156691597227. The reversal of 5156691597225 is 5227951966515.

The square root of 5156691597225 is 2270835.

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

5156691597225 is a `hidden beast` number, since 5 + 15 + 6 + 6 + 9 + 1 + 597 + 2 + 25 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1073107456281 + 4083584140944 = 1035909^2 + 2020788^2 .

It is not a de Polignac number, because 5156691597225 - 2³ = 5156691597217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (5156691597227) by changing a digit.

It is a polite number, since it can be written in 350 ways as a sum of consecutive naturals, for example, 57940354981 + ... + 57940355069.

Almost surely, 2^{5156691597225} is an apocalyptic number.

5156691597225 is the 2270835-th square number.

5156691597225 is the 1135418-th centered octagonal number.

It is an amenable number.

5156691597225 is an abundant number, since it is smaller than the sum of its proper divisors (6127470717132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5156691597225 is an frugal number, since it uses more digits than its factorization.

5156691597225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 104 counting only the distinct ones).

The product of its digits is 51030000, while the sum is 63.

The spelling of 5156691597225 in words is "five trillion, one hundred fifty-six billion, six hundred ninety-one million, five hundred ninety-seven thousand, two hundred twenty-five".