25952940191487 has 4 divisors (see below), whose sum is σ = 34603920255320. Its totient is φ = 17301960127656.

The previous prime is 25952940191467. The next prime is 25952940191539. The reversal of 25952940191487 is 78419104925952.

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

It is not a de Polignac number, because 25952940191487 - 2³² = 25948645224191 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 (25952940191467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325490031912 + ... + 4325490031917.

It is an arithmetic number, because the mean of its divisors is an integer number (8650980063830).

Almost surely, 2^{25952940191487} is an apocalyptic number.

25952940191487 is a deficient number, since it is larger than the sum of its proper divisors (8650980063833).

25952940191487 is an equidigital number, since it uses as much as digits as its factorization.

25952940191487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650980063832.

The product of its (nonzero) digits is 65318400, while the sum is 66.

The spelling of 25952940191487 in words is "twenty-five trillion, nine hundred fifty-two billion, nine hundred forty million, one hundred ninety-one thousand, four hundred eighty-seven".