136206978369 has 16 divisors (see below), whose sum is σ = 226421990400. Its totient is φ = 70756871760.

The previous prime is 136206978361. The next prime is 136206978371. The reversal of 136206978369 is 963879602631.

It is not a de Polignac number, because 136206978369 - 2³ = 136206978361 is a prime.

It is a super-2 number, since 2×136206978369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136206978361) 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 15 ways as a sum of consecutive naturals, for example, 294820069 + ... + 294820530.

It is an arithmetic number, because the mean of its divisors is an integer number (14151374400).

Almost surely, 2^136206978369 is an apocalyptic number.

It is an amenable number.

136206978369 is a deficient number, since it is larger than the sum of its proper divisors (90215012031).

136206978369 is a wasteful number, since it uses less digits than its factorization.

136206978369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589640620.

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 136206978369 in words is "one hundred thirty-six billion, two hundred six million, nine hundred seventy-eight thousand, three hundred sixty-nine".