80644221000 has 512 divisors, whose sum is σ = 326968012800. Its totient is φ = 18002476800.

The previous prime is 80644220999. The next prime is 80644221001. The reversal of 80644221000 is 12244608.

80644221000 is a `hidden beast` number, since 8 + 0 + 6 + 442 + 210 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (80644220999) and next prime (80644221001).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (80644221001) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8122039 + ... + 8131961.

It is an arithmetic number, because the mean of its divisors is an integer number (638609400).

Almost surely, 2^80644221000 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 80644221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163484006400).

80644221000 is an abundant number, since it is smaller than the sum of its proper divisors (246323791800).

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

80644221000 is a wasteful number, since it uses less digits than its factorization.

80644221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10003 (or 9983 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 80644221000 its reverse (12244608), we get a palindrome (80656465608).

The spelling of 80644221000 in words is "eighty billion, six hundred forty-four million, two hundred twenty-one thousand".