136261078778 has 24 divisors (see below), whose sum is σ = 227505714240. Its totient is φ = 61152834600.

The previous prime is 136261078763. The next prime is 136261078841. The reversal of 136261078778 is 877870162631.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3544568 + ... + 3582803.

It is an arithmetic number, because the mean of its divisors is an integer number (9479404760).

Almost surely, 2^136261078778 is an apocalyptic number.

136261078778 is a deficient number, since it is larger than the sum of its proper divisors (91244635462).

136261078778 is a wasteful number, since it uses less digits than its factorization.

136261078778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127474 (or 7127463 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 136261078778 in words is "one hundred thirty-six billion, two hundred sixty-one million, seventy-eight thousand, seven hundred seventy-eight".