25802954239 has 4 divisors (see below), whose sum is σ = 25967304424. Its totient is φ = 25638604056.

The previous prime is 25802954183. The next prime is 25802954249. The reversal of 25802954239 is 93245920852.

It is a happy number.

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 25802954239 - 2²¹ = 25800857087 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25802954192 and 25802954201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25802954249) 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, 82174857 + ... + 82175170.

It is an arithmetic number, because the mean of its divisors is an integer number (6491826106).

Almost surely, 2^25802954239 is an apocalyptic number.

25802954239 is a deficient number, since it is larger than the sum of its proper divisors (164350185).

25802954239 is a wasteful number, since it uses less digits than its factorization.

25802954239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164350184.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 25802954239 in words is "twenty-five billion, eight hundred two million, nine hundred fifty-four thousand, two hundred thirty-nine".