25142042545 has 4 divisors (see below), whose sum is σ = 30170451060. Its totient is φ = 20113634032.

The previous prime is 25142042503. The next prime is 25142042573. The reversal of 25142042545 is 54524024152.

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 16602064801 + 8539977744 = 128849^2 + 92412^2 .

It is a cyclic number.

It is not a de Polignac number, because 25142042545 - 2¹⁵ = 25142009777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25142042545.

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, 2514204250 + ... + 2514204259.

It is an arithmetic number, because the mean of its divisors is an integer number (7542612765).

Almost surely, 2^25142042545 is an apocalyptic number.

It is an amenable number.

25142042545 is a deficient number, since it is larger than the sum of its proper divisors (5028408515).

25142042545 is an equidigital number, since it uses as much as digits as its factorization.

25142042545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5028408514.

The product of its (nonzero) digits is 64000, while the sum is 34.

Adding to 25142042545 its reverse (54524024152), we get a palindrome (79666066697).

The spelling of 25142042545 in words is "twenty-five billion, one hundred forty-two million, forty-two thousand, five hundred forty-five".