136807865618 has 16 divisors (see below), whose sum is σ = 206086987584. Its totient is φ = 68112681360.

The previous prime is 136807865609. The next prime is 136807865641. The reversal of 136807865618 is 816568708631.

It is a Curzon number.

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, 456083 + ... + 693993.

It is an arithmetic number, because the mean of its divisors is an integer number (12880436724).

Almost surely, 2^136807865618 is an apocalyptic number.

136807865618 is a deficient number, since it is larger than the sum of its proper divisors (69279121966).

136807865618 is a wasteful number, since it uses less digits than its factorization.

136807865618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239137.

The product of its (nonzero) digits is 11612160, while the sum is 59.

The spelling of 136807865618 in words is "one hundred thirty-six billion, eight hundred seven million, eight hundred sixty-five thousand, six hundred eighteen".