309341872618 has 32 divisors (see below), whose sum is σ = 479310676560. Its totient is φ = 149664153600.

The previous prime is 309341872613. The next prime is 309341872639. The reversal of 309341872618 is 816278143903.

It can be written as a sum of positive squares in 8 ways, for example, as 307684324249 + 1657548369 = 554693^2 + 40713^2 .

It is not an unprimeable number, because it can be changed into a prime (309341872613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2695228 + ... + 2807656.

Almost surely, 2^309341872618 is an apocalyptic number.

309341872618 is a deficient number, since it is larger than the sum of its proper divisors (169968803942).

309341872618 is a wasteful number, since it uses less digits than its factorization.

309341872618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112842.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 309341872618 in words is "three hundred nine billion, three hundred forty-one million, eight hundred seventy-two thousand, six hundred eighteen".