136206978368 has 28 divisors (see below), whose sum is σ = 270360990900. Its totient is φ = 68084524032.

The previous prime is 136206978361. The next prime is 136206978371. The reversal of 136206978368 is 863879602631.

It can be written as a sum of positive squares in 2 ways, for example, as 50844838144 + 85362140224 = 225488^2 + 292168^2 .

It is a super-2 number, since 2×136206978368² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136206978361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63293 + ... + 525756.

It is an arithmetic number, because the mean of its divisors is an integer number (9655749675).

Almost surely, 2^136206978368 is an apocalyptic number.

It is an amenable number.

136206978368 is a deficient number, since it is larger than the sum of its proper divisors (134154012532).

136206978368 is an equidigital number, since it uses as much as digits as its factorization.

136206978368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592674 (or 592664 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 136206978368 in words is "one hundred thirty-six billion, two hundred six million, nine hundred seventy-eight thousand, three hundred sixty-eight".