202139127618 has 16 divisors (see below), whose sum is σ = 404960013216. Its totient is φ = 67266082880.

The previous prime is 202139127587. The next prime is 202139127637. The reversal of 202139127618 is 816721931202.

It is a self number, because there is not a number n which added to its sum of digits gives 202139127618.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28402728 + ... + 28409843.

It is an arithmetic number, because the mean of its divisors is an integer number (25310000826).

Almost surely, 2^202139127618 is an apocalyptic number.

202139127618 is an abundant number, since it is smaller than the sum of its proper divisors (202820885598).

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

202139127618 is a wasteful number, since it uses less digits than its factorization.

202139127618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56813169.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 202139127618 in words is "two hundred two billion, one hundred thirty-nine million, one hundred twenty-seven thousand, six hundred eighteen".