25849570238 has 4 divisors (see below), whose sum is σ = 38774355360. Its totient is φ = 12924785118.

The previous prime is 25849570237. The next prime is 25849570247. The reversal of 25849570238 is 83207594852.

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

It is a self number, because there is not a number n which added to its sum of digits gives 25849570238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25849570237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6462392558 + ... + 6462392561.

It is an arithmetic number, because the mean of its divisors is an integer number (9693588840).

Almost surely, 2^25849570238 is an apocalyptic number.

25849570238 is a deficient number, since it is larger than the sum of its proper divisors (12924785122).

25849570238 is a wasteful number, since it uses less digits than its factorization.

25849570238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12924785121.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 25849570238 in words is "twenty-five billion, eight hundred forty-nine million, five hundred seventy thousand, two hundred thirty-eight".