80257128145 has 4 divisors (see below), whose sum is σ = 96308553780. Its totient is φ = 64205702512.

The previous prime is 80257128103. The next prime is 80257128151. The reversal of 80257128145 is 54182175208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17392598161 + 62864529984 = 131881^2 + 250728^2 .

It is a cyclic number.

It is not a de Polignac number, because 80257128145 - 2²⁹ = 79720257233 is a prime.

It is a super-2 number, since 2×80257128145² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8025712810 + ... + 8025712819.

It is an arithmetic number, because the mean of its divisors is an integer number (24077138445).

Almost surely, 2^80257128145 is an apocalyptic number.

It is an amenable number.

80257128145 is a deficient number, since it is larger than the sum of its proper divisors (16051425635).

80257128145 is a wasteful number, since it uses less digits than its factorization.

80257128145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16051425634.

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 80257128145 in words is "eighty billion, two hundred fifty-seven million, one hundred twenty-eight thousand, one hundred forty-five".