1273814420544 has 224 divisors, whose sum is σ = 3977837510400. Its totient is φ = 398340218880.

The previous prime is 1273814420533. The next prime is 1273814420569. The reversal of 1273814420544 is 4450244183721.

1273814420544 is a `hidden beast` number, since 1 + 2 + 7 + 3 + 81 + 4 + 4 + 20 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1273814420544.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9066222 + ... + 9205650.

Almost surely, 2^{1273814420544} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273814420544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988918755200).

1273814420544 is an abundant number, since it is smaller than the sum of its proper divisors (2704023089856).

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

1273814420544 is a wasteful number, since it uses less digits than its factorization.

1273814420544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139778 (or 139762 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 45.

The spelling of 1273814420544 in words is "one trillion, two hundred seventy-three billion, eight hundred fourteen million, four hundred twenty thousand, five hundred forty-four".