78194782080 has 320 divisors, whose sum is σ = 280894046400. Its totient is φ = 20729032704.

The previous prime is 78194782079. The next prime is 78194782097. The reversal of 78194782080 is 8028749187.

It is a happy number.

78194782080 is a `hidden beast` number, since 78 + 1 + 9 + 478 + 20 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×78194782080² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8963961 + ... + 8972679.

It is an arithmetic number, because the mean of its divisors is an integer number (877793895).

Almost surely, 2^78194782080 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 78194782080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140447023200).

78194782080 is an abundant number, since it is smaller than the sum of its proper divisors (202699264320).

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

78194782080 is a wasteful number, since it uses less digits than its factorization.

78194782080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923 (or 8902 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 54.

The spelling of 78194782080 in words is "seventy-eight billion, one hundred ninety-four million, seven hundred eighty-two thousand, eighty".