618656256 has 60 divisors (see below), whose sum is σ = 1785497142. Its totient is φ = 206217216.

The previous prime is 618656251. The next prime is 618656273. The reversal of 618656256 is 652656816.

It is a happy number.

618656256 is a `hidden beast` number, since 6 + 1 + 86 + 562 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 615833856 + 2822400 = 24816^2 + 1680^2 .

It is not an unprimeable number, because it can be changed into a prime (618656251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62521 + ... + 71736.

Almost surely, 2^618656256 is an apocalyptic number.

It is an amenable number.

618656256 is an abundant number, since it is smaller than the sum of its proper divisors (1166840886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618656256 is a wasteful number, since it uses less digits than its factorization.

618656256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134281 (or 134262 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 618656256 is about 24872.8015309896. The cubic root of 618656256 is about 852.0854242193.

It can be divided in two parts, 61865 and 6256, that added together give a square (68121 = 261²).

The spelling of 618656256 in words is "six hundred eighteen million, six hundred fifty-six thousand, two hundred fifty-six".