694613899225 has 81 divisors (see below), whose sum is σ = 942640504479. Its totient is φ = 507661927200.

The previous prime is 694613899223. The next prime is 694613899229. The reversal of 694613899225 is 522998316496.

The square root of 694613899225 is 833435.

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

It can be written as a sum of positive squares in only one way, i.e., 250061003721 + 444552895504 = 500061^2 + 666748^2 .

It is not a de Polignac number, because 694613899225 - 2¹ = 694613899223 is a prime.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (694613899223) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 2454465934 + ... + 2454466216.

Almost surely, 2^694613899225 is an apocalyptic number.

694613899225 is the 833435-th square number.

694613899225 is the 416718-th centered octagonal number.

It is an amenable number.

694613899225 is a deficient number, since it is larger than the sum of its proper divisors (248026605254).

694613899225 is an equidigital number, since it uses as much as digits as its factorization.

694613899225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 338 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 64.

Multiplying 694613899225 by its sum of digits (64), we get a square (44455289550400 = 6667480²).

The spelling of 694613899225 in words is "six hundred ninety-four billion, six hundred thirteen million, eight hundred ninety-nine thousand, two hundred twenty-five".