1236669802868 has 12 divisors (see below), whose sum is σ = 2164180929540. Its totient is φ = 618332394432.

The previous prime is 1236669802867. The next prime is 1236669802873. The reversal of 1236669802868 is 8682089666321.

It can be written as a sum of positive squares in 2 ways, for example, as 441251975824 + 795417827044 = 664268^2 + 891862^2 .

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236669802861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 892130 + ... + 1808102.

It is an arithmetic number, because the mean of its divisors is an integer number (180348410795).

Almost surely, 2^{1236669802868} is an apocalyptic number.

It is an amenable number.

1236669802868 is a deficient number, since it is larger than the sum of its proper divisors (927511126672).

1236669802868 is a wasteful number, since it uses less digits than its factorization.

1236669802868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253506 (or 1253504 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 65.

The spelling of 1236669802868 in words is "one trillion, two hundred thirty-six billion, six hundred sixty-nine million, eight hundred two thousand, eight hundred sixty-eight".