78906552894 has 160 divisors (see below), whose sum is σ = 196914896640. Its totient is φ = 23452416000.

The previous prime is 78906552889. The next prime is 78906552917. The reversal of 78906552894 is 49825560987.

78906552894 is a `hidden beast` number, since 78 + 9 + 0 + 6 + 552 + 8 + 9 + 4 = 666.

It is a super-2 number, since 2×78906552894² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 60650044 + ... + 60651344.

It is an arithmetic number, because the mean of its divisors is an integer number (1230718104).

Almost surely, 2^78906552894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78906552894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98457448320).

78906552894 is an abundant number, since it is smaller than the sum of its proper divisors (118008343746).

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

78906552894 is a wasteful number, since it uses less digits than its factorization.

78906552894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2288 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 63.

The spelling of 78906552894 in words is "seventy-eight billion, nine hundred six million, five hundred fifty-two thousand, eight hundred ninety-four".