78455485440 has 264 divisors, whose sum is σ = 281919062880. Its totient is φ = 20921131008.

The previous prime is 78455485411. The next prime is 78455485447. The reversal of 78455485440 is 4458455487.

78455485440 is a `hidden beast` number, since 7 + 8 + 4 + 5 + 548 + 54 + 40 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78455485447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1212631 + ... + 1275689.

Almost surely, 2^78455485440 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 78455485440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140959531440).

78455485440 is an abundant number, since it is smaller than the sum of its proper divisors (203463577440).

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

78455485440 is an equidigital number, since it uses as much as digits as its factorization.

78455485440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63099 (or 63069 counting only the distinct ones).

The product of its (nonzero) digits is 14336000, while the sum is 54.

The spelling of 78455485440 in words is "seventy-eight billion, four hundred fifty-five million, four hundred eighty-five thousand, four hundred forty".