625165361 has 4 divisors (see below), whose sum is σ = 661939812. Its totient is φ = 588390912.

The previous prime is 625165349. The next prime is 625165363. The reversal of 625165361 is 163561526.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 380055025 + 245110336 = 19495^2 + 15656^2 .

It is a cyclic number.

It is not a de Polignac number, because 625165361 - 2¹⁴ = 625148977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (625165363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18387200 + ... + 18387233.

It is an arithmetic number, because the mean of its divisors is an integer number (165484953).

Almost surely, 2^625165361 is an apocalyptic number.

It is an amenable number.

625165361 is a deficient number, since it is larger than the sum of its proper divisors (36774451).

625165361 is a wasteful number, since it uses less digits than its factorization.

625165361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36774450.

The product of its digits is 32400, while the sum is 35.

The square root of 625165361 is about 25003.3070012749. The cubic root of 625165361 is about 855.0633702446.

It can be divided in two parts, 625165 and 361, that added together give a palindrome (625526).

The spelling of 625165361 in words is "six hundred twenty-five million, one hundred sixty-five thousand, three hundred sixty-one".