1298323358640 has 1920 divisors, whose sum is σ = 6026206298112. Its totient is φ = 251763240960.

The previous prime is 1298323358627. The next prime is 1298323358671. The reversal of 1298323358640 is 468533238921.

1298323358640 is a `hidden beast` number, since 1 + 29 + 8 + 3 + 2 + 33 + 586 + 4 + 0 = 666.

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

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 383 ways as a sum of consecutive naturals, for example, 1480413882 + ... + 1480414758.

Almost surely, 2^{1298323358640} is an apocalyptic number.

1298323358640 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 1298323358640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3013103149056).

1298323358640 is an abundant number, since it is smaller than the sum of its proper divisors (4727882939472).

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

1298323358640 is a wasteful number, since it uses less digits than its factorization.

1298323358640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 971 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 54.

The spelling of 1298323358640 in words is "one trillion, two hundred ninety-eight billion, three hundred twenty-three million, three hundred fifty-eight thousand, six hundred forty".