136807845778 has 4 divisors (see below), whose sum is σ = 205211768670. Its totient is φ = 68403922888.

The previous prime is 136807845721. The next prime is 136807845791. The reversal of 136807845778 is 877548708631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 131527352889 + 5280492889 = 362667^2 + 72667^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34201961443 + ... + 34201961446.

Almost surely, 2^136807845778 is an apocalyptic number.

136807845778 is a deficient number, since it is larger than the sum of its proper divisors (68403922892).

136807845778 is an equidigital number, since it uses as much as digits as its factorization.

136807845778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68403922891.

The product of its (nonzero) digits is 63221760, while the sum is 64.

The spelling of 136807845778 in words is "one hundred thirty-six billion, eight hundred seven million, eight hundred forty-five thousand, seven hundred seventy-eight".