1247990956800 has 864 divisors, whose sum is σ = 4958815948800. Its totient is φ = 276008140800.

The previous prime is 1247990956799. The next prime is 1247990956829. The reversal of 1247990956800 is 86590997421.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 204150544 + ... + 204156656.

Almost surely, 2^{1247990956800} is an apocalyptic number.

1247990956800 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 1247990956800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2479407974400).

1247990956800 is an abundant number, since it is smaller than the sum of its proper divisors (3710824992000).

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

1247990956800 is an equidigital number, since it uses as much as digits as its factorization.

1247990956800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6194 (or 6161 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 1247990956800 in words is "one trillion, two hundred forty-seven billion, nine hundred ninety million, nine hundred fifty-six thousand, eight hundred".