78612549408 has 192 divisors, whose sum is σ = 232843766400. Its totient is φ = 25800192000.

The previous prime is 78612549403. The next prime is 78612549427. The reversal of 78612549408 is 80494521687.

It is a happy number.

78612549408 is a `hidden beast` number, since 7 + 86 + 12 + 549 + 4 + 0 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (78612549403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19298860 + ... + 19302932.

It is an arithmetic number, because the mean of its divisors is an integer number (1212727950).

Almost surely, 2^78612549408 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 78612549408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116421883200).

78612549408 is an abundant number, since it is smaller than the sum of its proper divisors (154231216992).

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

78612549408 is a wasteful number, since it uses less digits than its factorization.

78612549408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4432 (or 4418 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 78612549408 in words is "seventy-eight billion, six hundred twelve million, five hundred forty-nine thousand, four hundred eight".