80443140625 has 21 divisors (see below), whose sum is σ = 100596974061. Its totient is φ = 64326150000.

The previous prime is 80443140623. The next prime is 80443140641. The reversal of 80443140625 is 52604134408.

The square root of 80443140625 is 283625.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 10 ways, for example, as 23272417809 + 57170722816 = 152553^2 + 239104^2 .

It is not a de Polignac number, because 80443140625 - 2¹ = 80443140623 is a prime.

It is a super-2 number, since 2×80443140625² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80443140623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 35451991 + ... + 35454259.

Almost surely, 2^80443140625 is an apocalyptic number.

80443140625 is the 283625-th square number.

80443140625 is the 141813-rd centered octagonal number.

It is an amenable number.

80443140625 is a deficient number, since it is larger than the sum of its proper divisors (20153833436).

80443140625 is an frugal number, since it uses more digits than its factorization.

80443140625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4568 (or 2274 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 80443140625 in words is "eighty billion, four hundred forty-three million, one hundred forty thousand, six hundred twenty-five".