136294487818 has 8 divisors (see below), whose sum is σ = 204808774212. Its totient is φ = 68024896416.

The previous prime is 136294487789. The next prime is 136294487837. The reversal of 136294487818 is 818784492631.

It can be written as a sum of positive squares in 2 ways, for example, as 126020030049 + 10274457769 = 354993^2 + 101363^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×136294487818² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61172355 + ... + 61174582.

Almost surely, 2^136294487818 is an apocalyptic number.

136294487818 is a deficient number, since it is larger than the sum of its proper divisors (68514286394).

136294487818 is a wasteful number, since it uses less digits than its factorization.

136294487818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122347496.

The product of its digits is 18579456, while the sum is 61.

The spelling of 136294487818 in words is "one hundred thirty-six billion, two hundred ninety-four million, four hundred eighty-seven thousand, eight hundred eighteen".