1244072415978 has 96 divisors (see below), whose sum is σ = 3156953304960. Its totient is φ = 346641592320.

The previous prime is 1244072415977. The next prime is 1244072416003. The reversal of 1244072415978 is 8795142704421.

It is a happy number.

1244072415978 is a `hidden beast` number, since 1 + 2 + 4 + 4 + 0 + 7 + 2 + 41 + 597 + 8 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1244072415977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13276426 + ... + 13369802.

It is an arithmetic number, because the mean of its divisors is an integer number (32884930260).

Almost surely, 2^{1244072415978} is an apocalyptic number.

1244072415978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244072415978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578476652480).

1244072415978 is an abundant number, since it is smaller than the sum of its proper divisors (1912880888982).

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

1244072415978 is a wasteful number, since it uses less digits than its factorization.

1244072415978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96012 (or 96009 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 54.

The spelling of 1244072415978 in words is "one trillion, two hundred forty-four billion, seventy-two million, four hundred fifteen thousand, nine hundred seventy-eight".