1978458080000 has 180 divisors, whose sum is σ = 5068296063600. Its totient is φ = 769992192000.

The previous prime is 1978458079999. The next prime is 1978458080063. The reversal of 1978458080000 is 808548791.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5752901 + ... + 6087099.

Almost surely, 2^{1978458080000} is an apocalyptic number.

1978458080000 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 1978458080000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2534148031800).

1978458080000 is an abundant number, since it is smaller than the sum of its proper divisors (3089837983600).

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

1978458080000 is an frugal number, since it uses more digits than its factorization.

1978458080000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334272 (or 334243 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 1978458080000 in words is "one trillion, nine hundred seventy-eight billion, four hundred fifty-eight million, eighty thousand".