634547662225 has 27 divisors (see below), whose sum is σ = 790914849843. Its totient is φ = 505022144640.

The previous prime is 634547662223. The next prime is 634547662261. The reversal of 634547662225 is 522266745436.

The square root of 634547662225 is 796585.

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

It can be written as a sum of positive squares in 13 ways, for example, as 587257070929 + 47290591296 = 766327^2 + 217464^2 .

It is not a de Polignac number, because 634547662225 - 2¹ = 634547662223 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634547662223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1246655271 + ... + 1246655779.

Almost surely, 2^634547662225 is an apocalyptic number.

634547662225 is the 796585-th square number.

634547662225 is the 398293-rd centered octagonal number.

It is an amenable number.

634547662225 is a deficient number, since it is larger than the sum of its proper divisors (156367187618).

634547662225 is an frugal number, since it uses more digits than its factorization.

634547662225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654 (or 827 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 52.

The spelling of 634547662225 in words is "six hundred thirty-four billion, five hundred forty-seven million, six hundred sixty-two thousand, two hundred twenty-five".