618636225 has 12 divisors (see below), whose sum is σ = 1022812016. Its totient is φ = 329939280.

The previous prime is 618636163. The next prime is 618636251. The reversal of 618636225 is 522636816.

It is not a de Polignac number, because 618636225 - 2⁷ = 618636097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4124167 + ... + 4124316.

Almost surely, 2^618636225 is an apocalyptic number.

It is an amenable number.

618636225 is a deficient number, since it is larger than the sum of its proper divisors (404175791).

618636225 is a wasteful number, since it uses less digits than its factorization.

618636225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8248496 (or 8248491 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 618636225 is about 24872.3988589762. The cubic root of 618636225 is about 852.0762277783.

The spelling of 618636225 in words is "six hundred eighteen million, six hundred thirty-six thousand, two hundred twenty-five".