25939187086 has 4 divisors (see below), whose sum is σ = 38908780632. Its totient is φ = 12969593542.

The previous prime is 25939187081. The next prime is 25939187119. The reversal of 25939187086 is 68078193952.

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

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 25939187086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25939187081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6484796770 + ... + 6484796773.

It is an arithmetic number, because the mean of its divisors is an integer number (9727195158).

Almost surely, 2^25939187086 is an apocalyptic number.

25939187086 is a deficient number, since it is larger than the sum of its proper divisors (12969593546).

25939187086 is a wasteful number, since it uses less digits than its factorization.

25939187086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12969593545.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 25939187086 in words is "twenty-five billion, nine hundred thirty-nine million, one hundred eighty-seven thousand, eighty-six".