6349699225 has 9 divisors (see below), whose sum is σ = 7874121117. Its totient is φ = 5079440640.

The previous prime is 6349699199. The next prime is 6349699231. The reversal of 6349699225 is 5229969436.

The square root of 6349699225 is 79685.

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

It can be written as a sum of positive squares in 4 ways, for example, as 26904969 + 6322794256 = 5187^2 + 79516^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6349699225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 390457 + ... + 406393.

Almost surely, 2^6349699225 is an apocalyptic number.

6349699225 is the 79685-th square number.

6349699225 is the 39843-rd centered octagonal number.

It is an amenable number.

6349699225 is a deficient number, since it is larger than the sum of its proper divisors (1524421892).

6349699225 is an frugal number, since it uses more digits than its factorization.

6349699225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31884 (or 15942 counting only the distinct ones).

The product of its digits is 6298560, while the sum is 55.

The cubic root of 6349699225 is about 1851.7586612150.

The spelling of 6349699225 in words is "six billion, three hundred forty-nine million, six hundred ninety-nine thousand, two hundred twenty-five".