997184378000 has 80 divisors (see below), whose sum is σ = 2488972362240. Its totient is φ = 386006832000.

The previous prime is 997184377967. The next prime is 997184378011. The reversal of 997184378000 is 873481799.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7979810 + ... + 8103809.

It is an arithmetic number, because the mean of its divisors is an integer number (31112154528).

Almost surely, 2^997184378000 is an apocalyptic number.

It is an amenable number.

997184378000 is an abundant number, since it is smaller than the sum of its proper divisors (1491787984240).

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

997184378000 is a wasteful number, since it uses less digits than its factorization.

997184378000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16083673 (or 16083657 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 997184378000 in words is "nine hundred ninety-seven billion, one hundred eighty-four million, three hundred seventy-eight thousand".