78587404194816 has 704 divisors, whose sum is σ = 271054810494720. Its totient is φ = 22413341491200.

The previous prime is 78587404194797. The next prime is 78587404194823. The reversal of 78587404194816 is 61849140478587.

78587404194816 is a `hidden beast` number, since 7 + 8 + 58 + 7 + 404 + 1 + 94 + 81 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (704).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 625528486 + ... + 625654106.

Almost surely, 2^{78587404194816} 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 78587404194816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135527405247360).

78587404194816 is an abundant number, since it is smaller than the sum of its proper divisors (192467406299904).

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

78587404194816 is a wasteful number, since it uses less digits than its factorization.

78587404194816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125700 (or 125654 counting only the distinct ones).

The product of its (nonzero) digits is 433520640, while the sum is 72.

The spelling of 78587404194816 in words is "seventy-eight trillion, five hundred eighty-seven billion, four hundred four million, one hundred ninety-four thousand, eight hundred sixteen".