425856658523 has 4 divisors (see below), whose sum is σ = 426261851448. Its totient is φ = 425451465600.

The previous prime is 425856658511. The next prime is 425856658541. The reversal of 425856658523 is 325856658524.

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

It is a cyclic number.

It is not a de Polignac number, because 425856658523 - 2²⁰ = 425855609947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425856658223) 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, 202594886 + ... + 202596987.

It is an arithmetic number, because the mean of its divisors is an integer number (106565462862).

Almost surely, 2^425856658523 is an apocalyptic number.

425856658523 is a deficient number, since it is larger than the sum of its proper divisors (405192925).

425856658523 is a wasteful number, since it uses less digits than its factorization.

425856658523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405192924.

The product of its digits is 69120000, while the sum is 59.

Subtracting from 425856658523 its reverse (325856658524), we obtain a palindrome (99999999999).

The spelling of 425856658523 in words is "four hundred twenty-five billion, eight hundred fifty-six million, six hundred fifty-eight thousand, five hundred twenty-three".