136749911108778 has 48 divisors (see below), whose sum is σ = 325898360716032. Its totient is φ = 41439366995400.

The previous prime is 136749911108753. The next prime is 136749911108779. The reversal of 136749911108778 is 877801119947631.

136749911108778 is a `hidden beast` number, since 1 + 3 + 67 + 499 + 1 + 1 + 1 + 0 + 8 + 7 + 78 = 666.

It is not an unprimeable number, because it can be changed into a prime (136749911108779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2853926938 + ... + 2853974853.

It is an arithmetic number, because the mean of its divisors is an integer number (6789549181584).

Almost surely, 2^{136749911108778} is an apocalyptic number.

136749911108778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

136749911108778 is an abundant number, since it is smaller than the sum of its proper divisors (189148449607254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136749911108778 is a wasteful number, since it uses less digits than its factorization.

136749911108778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5707901832 (or 5707901807 counting only the distinct ones).

The product of its (nonzero) digits is 128024064, while the sum is 72.

The spelling of 136749911108778 in words is "one hundred thirty-six trillion, seven hundred forty-nine billion, nine hundred eleven million, one hundred eight thousand, seven hundred seventy-eight".