25042383917 has 4 divisors (see below), whose sum is σ = 25042706940. Its totient is φ = 25042060896.

The previous prime is 25042383907. The next prime is 25042383931. The reversal of 25042383917 is 71938324052.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7462540996 + 17579842921 = 86386^2 + 132589^2 .

It is a cyclic number.

It is not a de Polignac number, because 25042383917 - 2⁴ = 25042383901 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 (25042383907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32303 + ... + 226115.

It is an arithmetic number, because the mean of its divisors is an integer number (6260676735).

It is a Poulet number, since it divides 2^25042383916-1.

Almost surely, 2^25042383917 is an apocalyptic number.

25042383917 is the 129209-th pentagonal number.

It is an amenable number.

25042383917 is a deficient number, since it is larger than the sum of its proper divisors (323023).

25042383917 is a wasteful number, since it uses less digits than its factorization.

25042383917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323022.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 25042383917 in words is "twenty-five billion, forty-two million, three hundred eighty-three thousand, nine hundred seventeen".