1218709770936 has 64 divisors (see below), whose sum is σ = 3486817850880. Its totient is φ = 347723798400.

The previous prime is 1218709770931. The next prime is 1218709770959. The reversal of 1218709770936 is 6390779078121.

It is a self number, because there is not a number n which added to its sum of digits gives 1218709770936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218709770931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4867015 + ... + 5111286.

It is an arithmetic number, because the mean of its divisors is an integer number (54481528920).

Almost surely, 2^{1218709770936} is an apocalyptic number.

It is an amenable number.

1218709770936 is an abundant number, since it is smaller than the sum of its proper divisors (2268108079944).

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

1218709770936 is a wasteful number, since it uses less digits than its factorization.

1218709770936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9979044 (or 9979040 counting only the distinct ones).

The product of its (nonzero) digits is 8001504, while the sum is 60.

The spelling of 1218709770936 in words is "one trillion, two hundred eighteen billion, seven hundred nine million, seven hundred seventy thousand, nine hundred thirty-six".