80568721800 has 288 divisors, whose sum is σ = 312237694080. Its totient is φ = 18236620800.

The previous prime is 80568721787. The next prime is 80568721801. The reversal of 80568721800 is 812786508.

80568721800 is a `hidden beast` number, since 8 + 0 + 568 + 7 + 2 + 1 + 80 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (80568721801) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1266760 + ... + 1328840.

It is an arithmetic number, because the mean of its divisors is an integer number (1084158660).

Almost surely, 2^80568721800 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 80568721800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156118847040).

80568721800 is an abundant number, since it is smaller than the sum of its proper divisors (231668972280).

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

80568721800 is a wasteful number, since it uses less digits than its factorization.

80568721800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62213 (or 62201 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The spelling of 80568721800 in words is "eighty billion, five hundred sixty-eight million, seven hundred twenty-one thousand, eight hundred".