1273456154880 has 1296 divisors, whose sum is σ = 5566791484800. Its totient is φ = 268544360448.

The previous prime is 1273456154879. The next prime is 1273456154909. The reversal of 1273456154880 is 884516543721.

It is a happy number.

1273456154880 is a `hidden beast` number, since 1 + 2 + 7 + 34 + 5 + 61 + 548 + 8 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 667778887 + ... + 667780793.

It is an arithmetic number, because the mean of its divisors is an integer number (4295363800).

Almost surely, 2^{1273456154880} is an apocalyptic number.

1273456154880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273456154880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2783395742400).

1273456154880 is an abundant number, since it is smaller than the sum of its proper divisors (4293335329920).

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

1273456154880 is a wasteful number, since it uses less digits than its factorization.

1273456154880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 1273456154880 in words is "one trillion, two hundred seventy-three billion, four hundred fifty-six million, one hundred fifty-four thousand, eight hundred eighty".