2256651618 has 16 divisors (see below), whose sum is σ = 4860480576. Its totient is φ = 694354320.

The previous prime is 2256651613. The next prime is 2256651619. The reversal of 2256651618 is 8161566522.

It is a self number, because there is not a number n which added to its sum of digits gives 2256651618.

It is not an unprimeable number, because it can be changed into a prime (2256651611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14465638 + ... + 14465793.

It is an arithmetic number, because the mean of its divisors is an integer number (303780036).

Almost surely, 2^2256651618 is an apocalyptic number.

2256651618 is an abundant number, since it is smaller than the sum of its proper divisors (2603828958).

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

2256651618 is a wasteful number, since it uses less digits than its factorization.

2256651618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28931449.

The product of its digits is 172800, while the sum is 42.

The square root of 2256651618 is about 47504.2273697826. The cubic root of 2256651618 is about 1311.6606986373.

The spelling of 2256651618 in words is "two billion, two hundred fifty-six million, six hundred fifty-one thousand, six hundred eighteen".