1298557467648 has 352 divisors, whose sum is σ = 4546658841600. Its totient is φ = 358221201408.

The previous prime is 1298557467631. The next prime is 1298557467707. The reversal of 1298557467648 is 8467647558921.

1298557467648 is a `hidden beast` number, since 1 + 2 + 9 + 8 + 5 + 574 + 6 + 7 + 6 + 48 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5496861 + ... + 5728227.

Almost surely, 2^{1298557467648} is an apocalyptic number.

1298557467648 is a gapful number since it is divisible by the number (18) 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 1298557467648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2273329420800).

1298557467648 is an abundant number, since it is smaller than the sum of its proper divisors (3248101373952).

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

1298557467648 is a wasteful number, since it uses less digits than its factorization.

1298557467648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231432 (or 231408 counting only the distinct ones).

The product of its digits is 812851200, while the sum is 72.

The spelling of 1298557467648 in words is "one trillion, two hundred ninety-eight billion, five hundred fifty-seven million, four hundred sixty-seven thousand, six hundred forty-eight".