78947097408 has 168 divisors, whose sum is σ = 236840255808. Its totient is φ = 25095426048.

The previous prime is 78947097407. The next prime is 78947097421. The reversal of 78947097408 is 80479074987.

It is a happy number.

78947097408 is a `hidden beast` number, since 78 + 9 + 4 + 70 + 97 + 408 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78947097407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4455735 + ... + 4473417.

Almost surely, 2^78947097408 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 78947097408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118420127904).

78947097408 is an abundant number, since it is smaller than the sum of its proper divisors (157893158400).

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

78947097408 is a wasteful number, since it uses less digits than its factorization.

78947097408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18061 (or 18048 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The spelling of 78947097408 in words is "seventy-eight billion, nine hundred forty-seven million, ninety-seven thousand, four hundred eight".