25651523039 has 4 divisors (see below), whose sum is σ = 25900567056. Its totient is φ = 25402479024.

The previous prime is 25651522999. The next prime is 25651523081. The reversal of 25651523039 is 93032515652.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25651523039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25651522987 and 25651523005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25651523539) 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, 124521854 + ... + 124522059.

It is an arithmetic number, because the mean of its divisors is an integer number (6475141764).

Almost surely, 2^25651523039 is an apocalyptic number.

25651523039 is a deficient number, since it is larger than the sum of its proper divisors (249044017).

25651523039 is a wasteful number, since it uses less digits than its factorization.

25651523039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249044016.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 25651523039 in words is "twenty-five billion, six hundred fifty-one million, five hundred twenty-three thousand, thirty-nine".