1276313345424 has 120 divisors (see below), whose sum is σ = 3852671272632. Its totient is φ = 392098775040.

The previous prime is 1276313345369. The next prime is 1276313345467. The reversal of 1276313345424 is 4245433136721.

1276313345424 is a `hidden beast` number, since 1 + 2 + 7 + 63 + 13 + 34 + 542 + 4 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 655419776400 + 620893569024 = 809580^2 + 787968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1276313345424.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 668134 + ... + 1731770.

Almost surely, 2^{1276313345424} 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 1276313345424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1926335636316).

1276313345424 is an abundant number, since it is smaller than the sum of its proper divisors (2576357927208).

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

1276313345424 is a wasteful number, since it uses less digits than its factorization.

1276313345424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064305 (or 1064296 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 45.

The spelling of 1276313345424 in words is "one trillion, two hundred seventy-six billion, three hundred thirteen million, three hundred forty-five thousand, four hundred twenty-four".