97978820000 has 480 divisors, whose sum is σ = 278449617600. Its totient is φ = 33675264000.

The previous prime is 97978819973. The next prime is 97978820039. The reversal of 97978820000 is 2887979.

It is a happy number.

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 79 ways as a sum of consecutive naturals, for example, 187339739 + ... + 187340261.

It is an arithmetic number, because the mean of its divisors is an integer number (580103370).

Almost surely, 2^97978820000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 97978820000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139224808800).

97978820000 is an abundant number, since it is smaller than the sum of its proper divisors (180470797600).

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

97978820000 is a wasteful number, since it uses less digits than its factorization.

97978820000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 97978820000 in words is "ninety-seven billion, nine hundred seventy-eight million, eight hundred twenty thousand".