80687243025 has 81 divisors (see below), whose sum is σ = 149904664819. Its totient is φ = 41485664640.

The previous prime is 80687243011. The next prime is 80687243033. The reversal of 80687243025 is 52034278608.

The square root of 80687243025 is 284055.

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

It can be written as a sum of positive squares in 13 ways, for example, as 69257922561 + 11429320464 = 263169^2 + 106908^2 .

It is not a de Polignac number, because 80687243025 - 2¹³ = 80687234833 is a prime.

It is a super-2 number, since 2×80687243025² (a number of 23 digits) contains 22 as substring.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 123563599 + ... + 123564251.

Almost surely, 2^80687243025 is an apocalyptic number.

80687243025 is the 284055-th square number.

80687243025 is the 142028-th centered octagonal number.

It is an amenable number.

80687243025 is a deficient number, since it is larger than the sum of its proper divisors (69217421794).

80687243025 is an equidigital number, since it uses as much as digits as its factorization.

80687243025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 80687243025 in words is "eighty billion, six hundred eighty-seven million, two hundred forty-three thousand, twenty-five".