1243372981860 has 192 divisors, whose sum is σ = 3894105196800. Its totient is φ = 329358541824.

The previous prime is 1243372981819. The next prime is 1243372981871. The reversal of 1243372981860 is 681892733421.

It is a happy number.

1243372981860 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 372 + 98 + 186 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1243372981797 and 1243372981806.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54770032 + ... + 54792728.

It is an arithmetic number, because the mean of its divisors is an integer number (20281797900).

Almost surely, 2^{1243372981860} is an apocalyptic number.

1243372981860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243372981860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1947052598400).

1243372981860 is an abundant number, since it is smaller than the sum of its proper divisors (2650732214940).

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

1243372981860 is a wasteful number, since it uses less digits than its factorization.

1243372981860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23387 (or 23379 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 1243372981860 in words is "one trillion, two hundred forty-three billion, three hundred seventy-two million, nine hundred eighty-one thousand, eight hundred sixty".