800421642240 has 272 divisors, whose sum is σ = 2794215617856. Its totient is φ = 194038988800.

The previous prime is 800421642227. The next prime is 800421642277. The reversal of 800421642240 is 42246124008.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10776430 + ... + 10850450.

Almost surely, 2^800421642240 is an apocalyptic number.

800421642240 is a gapful number since it is divisible by the number (80) 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 800421642240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397107808928).

800421642240 is an abundant number, since it is smaller than the sum of its proper divisors (1993793975616).

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

800421642240 is an equidigital number, since it uses as much as digits as its factorization.

800421642240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74072 (or 74042 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

Adding to 800421642240 its reverse (42246124008), we get a palindrome (842667766248).

The spelling of 800421642240 in words is "eight hundred billion, four hundred twenty-one million, six hundred forty-two thousand, two hundred forty".