617157425 has 6 divisors (see below), whose sum is σ = 765275238. Its totient is φ = 493725920.

The previous prime is 617157397. The next prime is 617157427. The reversal of 617157425 is 524751716.

It can be written as a sum of positive squares in 3 ways, for example, as 4545424 + 612612001 = 2132^2 + 24751^2 .

It is a de Polignac number, because none of the positive numbers 2^k-617157425 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617157427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12343124 + ... + 12343173.

It is an arithmetic number, because the mean of its divisors is an integer number (127545873).

Almost surely, 2^617157425 is an apocalyptic number.

It is an amenable number.

617157425 is a deficient number, since it is larger than the sum of its proper divisors (148117813).

617157425 is a wasteful number, since it uses less digits than its factorization.

617157425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24686307 (or 24686302 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 617157425 is about 24842.6533405754. The cubic root of 617157425 is about 851.3967462422.

The spelling of 617157425 in words is "six hundred seventeen million, one hundred fifty-seven thousand, four hundred twenty-five".