78897589644888 has 576 divisors, whose sum is σ = 267937585344000. Its totient is φ = 20845014833664.

The previous prime is 78897589644859. The next prime is 78897589644953. The reversal of 78897589644888 is 88844698579887.

78897589644888 is a `hidden beast` number, since 7 + 8 + 8 + 9 + 7 + 58 + 9 + 64 + 488 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1175104423 + ... + 1175171561.

It is an arithmetic number, because the mean of its divisors is an integer number (465169419000).

Almost surely, 2^{78897589644888} 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 78897589644888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133968792672000).

78897589644888 is an abundant number, since it is smaller than the sum of its proper divisors (189039995699112).

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

78897589644888 is a wasteful number, since it uses less digits than its factorization.

78897589644888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67604 (or 67590 counting only the distinct ones).

The product of its digits is 499415777280, while the sum is 99.

The spelling of 78897589644888 in words is "seventy-eight trillion, eight hundred ninety-seven billion, five hundred eighty-nine million, six hundred forty-four thousand, eight hundred eighty-eight".