1209939216264 has 48 divisors (see below), whose sum is σ = 3282229882620. Its totient is φ = 402659389440.

The previous prime is 1209939216229. The next prime is 1209939216271. The reversal of 1209939216264 is 4626129399021.

1209939216264 is a `hidden beast` number, since 1 + 2 + 0 + 9 + 9 + 3 + 9 + 2 + 1 + 626 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1072032452100 + 137906764164 = 1035390^2 + 371358^2 .

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1209939216264.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13573657 + ... + 13662504.

Almost surely, 2^{1209939216264} is an apocalyptic number.

It is an amenable number.

1209939216264 is an abundant number, since it is smaller than the sum of its proper divisors (2072290666356).

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

1209939216264 is a wasteful number, since it uses less digits than its factorization.

1209939216264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27236790 (or 27236783 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 1209939216264 in words is "one trillion, two hundred nine billion, nine hundred thirty-nine million, two hundred sixteen thousand, two hundred sixty-four".