25708165423 has 4 divisors (see below), whose sum is σ = 25720345728. Its totient is φ = 25695985120.

The previous prime is 25708165411. The next prime is 25708165499. The reversal of 25708165423 is 32456180752.

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 25708165423 - 2²⁵ = 25674610991 is a prime.

It is a super-3 number, since 3×25708165423³ (a number of 32 digits) contains 333 as substring.

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 25708165423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25708165823) 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, 6086986 + ... + 6091207.

It is an arithmetic number, because the mean of its divisors is an integer number (6430086432).

Almost surely, 2^25708165423 is an apocalyptic number.

25708165423 is a deficient number, since it is larger than the sum of its proper divisors (12180305).

25708165423 is a wasteful number, since it uses less digits than its factorization.

25708165423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12180304.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 25708165423 in words is "twenty-five billion, seven hundred eight million, one hundred sixty-five thousand, four hundred twenty-three".