136218803858 has 4 divisors (see below), whose sum is σ = 204328205790. Its totient is φ = 68109401928.

The previous prime is 136218803849. The next prime is 136218803863. The reversal of 136218803858 is 858308812631.

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., 122222257609 + 13996546249 = 349603^2 + 118307^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34054700963 + ... + 34054700966.

Almost surely, 2^136218803858 is an apocalyptic number.

136218803858 is a deficient number, since it is larger than the sum of its proper divisors (68109401932).

136218803858 is an equidigital number, since it uses as much as digits as its factorization.

136218803858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68109401931.

The product of its (nonzero) digits is 2211840, while the sum is 53.

The spelling of 136218803858 in words is "one hundred thirty-six billion, two hundred eighteen million, eight hundred three thousand, eight hundred fifty-eight".