79281811800 has 432 divisors, whose sum is σ = 285546456000. Its totient is φ = 20449324800.

The previous prime is 79281811771. The next prime is 79281811823. The reversal of 79281811800 is 811818297.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 40677226 + ... + 40679174.

Almost surely, 2^79281811800 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 79281811800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142773228000).

79281811800 is an abundant number, since it is smaller than the sum of its proper divisors (206264644200).

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

79281811800 is a wasteful number, since it uses less digits than its factorization.

79281811800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 1990 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 45.

The spelling of 79281811800 in words is "seventy-nine billion, two hundred eighty-one million, eight hundred eleven thousand, eight hundred".