1272478746792 has 64 divisors (see below), whose sum is σ = 3621283407360. Its totient is φ = 368834417600.

The previous prime is 1272478746751. The next prime is 1272478746809. The reversal of 1272478746792 is 2976478742721.

It is a super-3 number, since 3×1272478746792³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 104776434 + ... + 104788577.

It is an arithmetic number, because the mean of its divisors is an integer number (56582553240).

Almost surely, 2^{1272478746792} is an apocalyptic number.

1272478746792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1272478746792 is an abundant number, since it is smaller than the sum of its proper divisors (2348804660568).

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

1272478746792 is a wasteful number, since it uses less digits than its factorization.

1272478746792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209565054 (or 209565050 counting only the distinct ones).

The product of its digits is 132765696, while the sum is 66.

The spelling of 1272478746792 in words is "one trillion, two hundred seventy-two billion, four hundred seventy-eight million, seven hundred forty-six thousand, seven hundred ninety-two".