1272393545992 has 128 divisors (see below), whose sum is σ = 2685821846400. Its totient is φ = 561564057600.

The previous prime is 1272393545977. The next prime is 1272393546019. The reversal of 1272393545992 is 2995453932721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272393545992.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 146567892 + ... + 146576572.

It is an arithmetic number, because the mean of its divisors is an integer number (20982983175).

Almost surely, 2^{1272393545992} is an apocalyptic number.

It is an amenable number.

1272393545992 is an abundant number, since it is smaller than the sum of its proper divisors (1413428300408).

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

1272393545992 is a wasteful number, since it uses less digits than its factorization.

1272393545992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9287 (or 9283 counting only the distinct ones).

The product of its digits is 36741600, while the sum is 61.

The spelling of 1272393545992 in words is "one trillion, two hundred seventy-two billion, three hundred ninety-three million, five hundred forty-five thousand, nine hundred ninety-two".