1298737440000 has 4320 divisors, whose sum is σ = 6777676249344. Its totient is φ = 230031360000.

The previous prime is 1298737439927. The next prime is 1298737440019. The reversal of 1298737440000 is 447378921.

1298737440000 is a `hidden beast` number, since 129 + 87 + 3 + 7 + 440 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 24504479974 + ... + 24504480026.

Almost surely, 2^{1298737440000} is an apocalyptic number.

1298737440000 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 1298737440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3388838124672).

1298737440000 is an abundant number, since it is smaller than the sum of its proper divisors (5478938809344).

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

1298737440000 is a wasteful number, since it uses less digits than its factorization.

1298737440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 1298737440000 in words is "one trillion, two hundred ninety-eight billion, seven hundred thirty-seven million, four hundred forty thousand".