78453455447808 has 360 divisors, whose sum is σ = 267393786615648. Its totient is φ = 22411866267648.

The previous prime is 78453455447803. The next prime is 78453455447831. The reversal of 78453455447808 is 80874455435487.

78453455447808 is a `hidden beast` number, since 7 + 8 + 4 + 5 + 3 + 4 + 5 + 544 + 78 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78453455447803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1046943910 + ... + 1047018842.

Almost surely, 2^{78453455447808} 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 78453455447808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133696893307824).

78453455447808 is an abundant number, since it is smaller than the sum of its proper divisors (188940331167840).

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

78453455447808 is an equidigital number, since it uses as much as digits as its factorization.

78453455447808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82181 (or 82158 counting only the distinct ones).

The product of its (nonzero) digits is 2408448000, while the sum is 72.

The spelling of 78453455447808 in words is "seventy-eight trillion, four hundred fifty-three billion, four hundred fifty-five million, four hundred forty-seven thousand, eight hundred eight".