1298793721968 has 80 divisors (see below), whose sum is σ = 3947314275360. Its totient is φ = 407464694784.

The previous prime is 1298793721921. The next prime is 1298793721993. The reversal of 1298793721968 is 8691273978921.

1298793721968 is a `hidden beast` number, since 12 + 98 + 79 + 372 + 1 + 96 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 1298793721896 and 1298793721905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88418155 + ... + 88432842.

It is an arithmetic number, because the mean of its divisors is an integer number (49341428442).

Almost surely, 2^{1298793721968} is an apocalyptic number.

1298793721968 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1298793721968 is an abundant number, since it is smaller than the sum of its proper divisors (2648520553392).

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

1298793721968 is a wasteful number, since it uses less digits than its factorization.

1298793721968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176851031 (or 176851019 counting only the distinct ones).

The product of its digits is 164602368, while the sum is 72.

The spelling of 1298793721968 in words is "one trillion, two hundred ninety-eight billion, seven hundred ninety-three million, seven hundred twenty-one thousand, nine hundred sixty-eight".