25857427427 has 8 divisors (see below), whose sum is σ = 29312063760. Its totient is φ = 22612163040.

The previous prime is 25857427411. The next prime is 25857427439. The reversal of 25857427427 is 72472475852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25857427427 - 2⁴ = 25857427411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25857427027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52342724 + ... + 52343217.

It is an arithmetic number, because the mean of its divisors is an integer number (3664007970).

Almost surely, 2^25857427427 is an apocalyptic number.

25857427427 is a deficient number, since it is larger than the sum of its proper divisors (3454636333).

25857427427 is a wasteful number, since it uses less digits than its factorization.

25857427427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104685973.

The product of its digits is 8780800, while the sum is 53.

The spelling of 25857427427 in words is "twenty-five billion, eight hundred fifty-seven million, four hundred twenty-seven thousand, four hundred twenty-seven".