25572142127 has 4 divisors (see below), whose sum is σ = 29225305296. Its totient is φ = 21918978960.

The previous prime is 25572142117. The next prime is 25572142171. The reversal of 25572142127 is 72124127552.

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 25572142127 - 2⁴ = 25572142111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25572142117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1826581574 + ... + 1826581587.

It is an arithmetic number, because the mean of its divisors is an integer number (7306326324).

Almost surely, 2^25572142127 is an apocalyptic number.

25572142127 is a deficient number, since it is larger than the sum of its proper divisors (3653163169).

25572142127 is an equidigital number, since it uses as much as digits as its factorization.

25572142127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653163168.

The product of its digits is 78400, while the sum is 38.

Adding to 25572142127 its reverse (72124127552), we get a palindrome (97696269679).

The spelling of 25572142127 in words is "twenty-five billion, five hundred seventy-two million, one hundred forty-two thousand, one hundred twenty-seven".