8259448157 has 4 divisors (see below), whose sum is σ = 8259641436. Its totient is φ = 8259254880.

The previous prime is 8259448139. The next prime is 8259448177. The reversal of 8259448157 is 7518449528.

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 2066702521 + 6192745636 = 45461^2 + 78694^2 .

It is a cyclic number.

It is not a de Polignac number, because 8259448157 - 2⁸ = 8259447901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8259448099 and 8259448108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8259448117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 968 + ... + 128529.

It is an arithmetic number, because the mean of its divisors is an integer number (2064910359).

Almost surely, 2^8259448157 is an apocalyptic number.

It is an amenable number.

8259448157 is a deficient number, since it is larger than the sum of its proper divisors (193279).

8259448157 is a wasteful number, since it uses less digits than its factorization.

8259448157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193278.

The product of its digits is 3225600, while the sum is 53.

The square root of 8259448157 is about 90881.5061329862. The cubic root of 8259448157 is about 2021.3910750306.

The spelling of 8259448157 in words is "eight billion, two hundred fifty-nine million, four hundred forty-eight thousand, one hundred fifty-seven".