1272378435792 has 80 divisors (see below), whose sum is σ = 3295849677120. Its totient is φ = 422982784000.

The previous prime is 1272378435787. The next prime is 1272378435799. The reversal of 1272378435792 is 2975348732721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272378435799) 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, 29776042 + ... + 29818742.

It is an arithmetic number, because the mean of its divisors is an integer number (41198120964).

Almost surely, 2^{1272378435792} is an apocalyptic number.

1272378435792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1272378435792 is an abundant number, since it is smaller than the sum of its proper divisors (2023471241328).

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

1272378435792 is a wasteful number, since it uses less digits than its factorization.

1272378435792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44372 (or 44366 counting only the distinct ones).

The product of its digits is 35562240, while the sum is 60.

The spelling of 1272378435792 in words is "one trillion, two hundred seventy-two billion, three hundred seventy-eight million, four hundred thirty-five thousand, seven hundred ninety-two".