157944618 has 24 divisors (see below), whose sum is σ = 368537988. Its totient is φ = 48598272.

The previous prime is 157944617. The next prime is 157944623. The reversal of 157944618 is 816449751.

It can be written as a sum of positive squares in 2 ways, for example, as 157929489 + 15129 = 12567^2 + 123^2 .

It is not an unprimeable number, because it can be changed into a prime (157944617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 337255 + ... + 337722.

Almost surely, 2^157944618 is an apocalyptic number.

157944618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

157944618 is an abundant number, since it is smaller than the sum of its proper divisors (210593370).

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

157944618 is a wasteful number, since it uses less digits than its factorization.

157944618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674998 (or 674995 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 157944618 is about 12567.6019192207. The cubic root of 157944618 is about 540.5488452678.

The spelling of 157944618 in words is "one hundred fifty-seven million, nine hundred forty-four thousand, six hundred eighteen".