1244213777456 has 20 divisors (see below), whose sum is σ = 2596099901472. Its totient is φ = 574252512576.

The previous prime is 1244213777449. The next prime is 1244213777497. The reversal of 1244213777456 is 6547773124421.

It is a super-2 number, since 2×1244213777456² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1244213777398 and 1244213777407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990898296 + ... + 2990898711.

Almost surely, 2^{1244213777456} is an apocalyptic number.

1244213777456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1244213777456 is an abundant number, since it is smaller than the sum of its proper divisors (1351886124016).

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

1244213777456 is a wasteful number, since it uses less digits than its factorization.

1244213777456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981797028 (or 5981797022 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 53.

The spelling of 1244213777456 in words is "one trillion, two hundred forty-four billion, two hundred thirteen million, seven hundred seventy-seven thousand, four hundred fifty-six".