80645434800 has 360 divisors, whose sum is σ = 301398829776. Its totient is φ = 18378823680.

The previous prime is 80645434799. The next prime is 80645434801. The reversal of 80645434800 is 843454608.

It is an interprime number because it is at equal distance from previous prime (80645434799) and next prime (80645434801).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (80645434801) 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, 21930562 + ... + 21934238.

Almost surely, 2^80645434800 is an apocalyptic number.

80645434800 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 80645434800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150699414888).

80645434800 is an abundant number, since it is smaller than the sum of its proper divisors (220753394976).

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

80645434800 is a wasteful number, since it uses less digits than its factorization.

80645434800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085 (or 4067 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 80645434800 in words is "eighty billion, six hundred forty-five million, four hundred thirty-four thousand, eight hundred".