136851968101 has 4 divisors (see below), whose sum is σ = 137186569900. Its totient is φ = 136517366304.

The previous prime is 136851968093. The next prime is 136851968111. The reversal of 136851968101 is 101869158631.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 103262609025 + 33589359076 = 321345^2 + 183274^2 .

It is a cyclic number.

It is not a de Polignac number, because 136851968101 - 2³ = 136851968093 is a prime.

It is a super-2 number, since 2×136851968101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136851968111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167300286 + ... + 167301103.

It is an arithmetic number, because the mean of its divisors is an integer number (34296642475).

Almost surely, 2^136851968101 is an apocalyptic number.

It is an amenable number.

136851968101 is a deficient number, since it is larger than the sum of its proper divisors (334601799).

136851968101 is an equidigital number, since it uses as much as digits as its factorization.

136851968101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334601798.

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 136851968101 in words is "one hundred thirty-six billion, eight hundred fifty-one million, nine hundred sixty-eight thousand, one hundred one".