78491590800 has 1080 divisors, whose sum is σ = 322877548800. Its totient is φ = 16231219200.

The previous prime is 78491590799. The next prime is 78491590829. The reversal of 78491590800 is 809519487.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 526789126 + ... + 526789274.

Almost surely, 2^78491590800 is an apocalyptic number.

78491590800 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78491590800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161438774400).

78491590800 is an abundant number, since it is smaller than the sum of its proper divisors (244385958000).

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

78491590800 is a wasteful number, since it uses less digits than its factorization.

78491590800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 78491590800 in words is "seventy-eight billion, four hundred ninety-one million, five hundred ninety thousand, eight hundred".