25897447487 has 8 divisors (see below), whose sum is σ = 26705243136. Its totient is φ = 25100351352.

The previous prime is 25897447453. The next prime is 25897447493. The reversal of 25897447487 is 78474479852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25897447487 - 2¹⁴ = 25897431103 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 (25897447427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2669963 + ... + 2679644.

It is an arithmetic number, because the mean of its divisors is an integer number (3338155392).

Almost surely, 2^25897447487 is an apocalyptic number.

25897447487 is a deficient number, since it is larger than the sum of its proper divisors (807795649).

25897447487 is a wasteful number, since it uses less digits than its factorization.

25897447487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349757.

The product of its digits is 126443520, while the sum is 65.

The spelling of 25897447487 in words is "twenty-five billion, eight hundred ninety-seven million, four hundred forty-seven thousand, four hundred eighty-seven".