80978361984 has 384 divisors, whose sum is σ = 265842420480. Its totient is φ = 24380559360.

The previous prime is 80978361943. The next prime is 80978362009. The reversal of 80978361984 is 48916387908.

80978361984 is a `hidden beast` number, since 8 + 0 + 9 + 7 + 8 + 3 + 619 + 8 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×80978361984² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19002414 + ... + 19006674.

It is an arithmetic number, because the mean of its divisors is an integer number (692297970).

Almost surely, 2^80978361984 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 80978361984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132921210240).

80978361984 is an abundant number, since it is smaller than the sum of its proper divisors (184864058496).

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

80978361984 is a wasteful number, since it uses less digits than its factorization.

80978361984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4350 (or 4326 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 80978361984 in words is "eighty billion, nine hundred seventy-eight million, three hundred sixty-one thousand, nine hundred eighty-four".