136378666664299 has 4 divisors (see below), whose sum is σ = 136470380631264. Its totient is φ = 136286952697336.

The previous prime is 136378666664293. The next prime is 136378666664323. The reversal of 136378666664299 is 992466666873631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136378666664299 - 2⁷ = 136378666664171 is a prime.

It is a super-2 number, since 2×136378666664299² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136378666664293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45856981252 + ... + 45856984225.

It is an arithmetic number, because the mean of its divisors is an integer number (34117595157816).

Almost surely, 2^{136378666664299} is an apocalyptic number.

136378666664299 is a deficient number, since it is larger than the sum of its proper divisors (91713966965).

136378666664299 is an equidigital number, since it uses as much as digits as its factorization.

136378666664299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91713966964.

The product of its digits is 15237476352, while the sum is 82.

The spelling of 136378666664299 in words is "one hundred thirty-six trillion, three hundred seventy-eight billion, six hundred sixty-six million, six hundred sixty-four thousand, two hundred ninety-nine".