25435346523 has 4 divisors (see below), whose sum is σ = 33913795368. Its totient is φ = 16956897680.

The previous prime is 25435346509. The next prime is 25435346539. The reversal of 25435346523 is 32564353452.

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 25435346523 - 2⁵ = 25435346491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25435346543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4239224418 + ... + 4239224423.

It is an arithmetic number, because the mean of its divisors is an integer number (8478448842).

Almost surely, 2^25435346523 is an apocalyptic number.

25435346523 is a deficient number, since it is larger than the sum of its proper divisors (8478448845).

25435346523 is an equidigital number, since it uses as much as digits as its factorization.

25435346523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8478448844.

The product of its digits is 1296000, while the sum is 42.

Adding to 25435346523 its reverse (32564353452), we get a palindrome (57999699975).

The spelling of 25435346523 in words is "twenty-five billion, four hundred thirty-five million, three hundred forty-six thousand, five hundred twenty-three".