1244359139968 has 64 divisors (see below), whose sum is σ = 2871949389120. Its totient is φ = 525991311360.

The previous prime is 1244359139963. The next prime is 1244359139983. The reversal of 1244359139968 is 8699319534421.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (1244359139963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9446878 + ... + 9577693.

It is an arithmetic number, because the mean of its divisors is an integer number (44874209205).

Almost surely, 2^{1244359139968} is an apocalyptic number.

It is an amenable number.

1244359139968 is an abundant number, since it is smaller than the sum of its proper divisors (1627590249152).

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

1244359139968 is an equidigital number, since it uses as much as digits as its factorization.

1244359139968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19024665 (or 19024653 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 64.

The spelling of 1244359139968 in words is "one trillion, two hundred forty-four billion, three hundred fifty-nine million, one hundred thirty-nine thousand, nine hundred sixty-eight".