1273499485440 has 576 divisors, whose sum is σ = 5178488716800. Its totient is φ = 259427008512.

The previous prime is 1273499485409. The next prime is 1273499485483. The reversal of 1273499485440 is 445849943721.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10070926 + ... + 10196594.

It is an arithmetic number, because the mean of its divisors is an integer number (8990431800).

Almost surely, 2^{1273499485440} is an apocalyptic number.

1273499485440 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 1273499485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2589244358400).

1273499485440 is an abundant number, since it is smaller than the sum of its proper divisors (3904989231360).

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

1273499485440 is a wasteful number, since it uses less digits than its factorization.

1273499485440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125742 (or 125728 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 60.

The spelling of 1273499485440 in words is "one trillion, two hundred seventy-three billion, four hundred ninety-nine million, four hundred eighty-five thousand, four hundred forty".