8257434145 has 4 divisors (see below), whose sum is σ = 9908920980. Its totient is φ = 6605947312.

The previous prime is 8257434137. The next prime is 8257434167. The reversal of 8257434145 is 5414347528.

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 4010435584 + 4246998561 = 63328^2 + 65169^2 .

It is a cyclic number.

It is not a de Polignac number, because 8257434145 - 2³ = 8257434137 is a prime.

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, 825743410 + ... + 825743419.

It is an arithmetic number, because the mean of its divisors is an integer number (2477230245).

Almost surely, 2^8257434145 is an apocalyptic number.

It is an amenable number.

8257434145 is a deficient number, since it is larger than the sum of its proper divisors (1651486835).

8257434145 is a wasteful number, since it uses less digits than its factorization.

8257434145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651486834.

The product of its digits is 537600, while the sum is 43.

The square root of 8257434145 is about 90870.4250292690. The cubic root of 8257434145 is about 2021.2267607102.

The spelling of 8257434145 in words is "eight billion, two hundred fifty-seven million, four hundred thirty-four thousand, one hundred forty-five".