136128854394 has 64 divisors (see below), whose sum is σ = 325931625600. Its totient is φ = 41866108416.

The previous prime is 136128854363. The next prime is 136128854413. The reversal of 136128854394 is 493458821631.

It is a happy number.

136128854394 is a `hidden beast` number, since 1 + 3 + 6 + 1 + 2 + 8 + 8 + 543 + 94 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 136128854394.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1485162 + ... + 1574154.

It is an arithmetic number, because the mean of its divisors is an integer number (5092681650).

Almost surely, 2^136128854394 is an apocalyptic number.

136128854394 is an abundant number, since it is smaller than the sum of its proper divisors (189802771206).

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

136128854394 is a wasteful number, since it uses less digits than its factorization.

136128854394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91196 (or 91190 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 136128854394 in words is "one hundred thirty-six billion, one hundred twenty-eight million, eight hundred fifty-four thousand, three hundred ninety-four".