75994437816 has 768 divisors, whose sum is σ = 263233152000. Its totient is φ = 20254924800.

The previous prime is 75994437797. The next prime is 75994437823. The reversal of 75994437816 is 61873449957.

75994437816 is a `hidden beast` number, since 7 + 599 + 4 + 4 + 37 + 8 + 1 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 510029710 + ... + 510029858.

It is an arithmetic number, because the mean of its divisors is an integer number (342751500).

Almost surely, 2^75994437816 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 75994437816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131616576000).

75994437816 is an abundant number, since it is smaller than the sum of its proper divisors (187238714184).

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

75994437816 is a wasteful number, since it uses less digits than its factorization.

75994437816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 266 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 75994437816 in words is "seventy-five billion, nine hundred ninety-four million, four hundred thirty-seven thousand, eight hundred sixteen".