25345142123 has 32 divisors (see below), whose sum is σ = 30604953600. Its totient is φ = 20519997696.

The previous prime is 25345142111. The next prime is 25345142153. The reversal of 25345142123 is 32124154352.

It is a cyclic number.

It is not a de Polignac number, because 25345142123 - 2⁶ = 25345142059 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25345142123.

It is not an unprimeable number, because it can be changed into a prime (25345142153) 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 31 ways as a sum of consecutive naturals, for example, 6448823 + ... + 6452751.

It is an arithmetic number, because the mean of its divisors is an integer number (956404800).

Almost surely, 2^25345142123 is an apocalyptic number.

25345142123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

25345142123 is a deficient number, since it is larger than the sum of its proper divisors (5259811477).

25345142123 is a wasteful number, since it uses less digits than its factorization.

25345142123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4451.

The product of its digits is 28800, while the sum is 32.

Adding to 25345142123 its reverse (32124154352), we get a palindrome (57469296475).

The spelling of 25345142123 in words is "twenty-five billion, three hundred forty-five million, one hundred forty-two thousand, one hundred twenty-three".