249425454618 has 12 divisors (see below), whose sum is σ = 540421818378. Its totient is φ = 83141818200.

The previous prime is 249425454613. The next prime is 249425454631. The reversal of 249425454618 is 816454524942.

249425454618 is a `hidden beast` number, since 2 + 4 + 9 + 42 + 54 + 546 + 1 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 249377388129 + 48066489 = 499377^2 + 6933^2 .

It is a super-2 number, since 2×249425454618² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (249425454613) 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, 6928484833 + ... + 6928484868.

Almost surely, 2^249425454618 is an apocalyptic number.

249425454618 is an abundant number, since it is smaller than the sum of its proper divisors (290996363760).

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

249425454618 is a wasteful number, since it uses less digits than its factorization.

249425454618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13856969709 (or 13856969706 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 54.

The spelling of 249425454618 in words is "two hundred forty-nine billion, four hundred twenty-five million, four hundred fifty-four thousand, six hundred eighteen".