1236920994688 has 128 divisors (see below), whose sum is σ = 2586960230400. Its totient is φ = 588408330240.

The previous prime is 1236920994679. The next prime is 1236920994707. The reversal of 1236920994688 is 8864990296321.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56798970 + ... + 56820742.

It is an arithmetic number, because the mean of its divisors is an integer number (20210626800).

Almost surely, 2^{1236920994688} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1236920994688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1293480115200).

1236920994688 is an abundant number, since it is smaller than the sum of its proper divisors (1350039235712).

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

1236920994688 is a wasteful number, since it uses less digits than its factorization.

1236920994688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22060 (or 22048 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 67.

The spelling of 1236920994688 in words is "one trillion, two hundred thirty-six billion, nine hundred twenty million, nine hundred ninety-four thousand, six hundred eighty-eight".