25787217511 has 8 divisors (see below), whose sum is σ = 28264837248. Its totient is φ = 23331819000.

The previous prime is 25787217509. The next prime is 25787217517. The reversal of 25787217511 is 11571278752.

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 25787217511 - 2¹ = 25787217509 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 (25787217517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5552875 + ... + 5557516.

It is an arithmetic number, because the mean of its divisors is an integer number (3533104656).

Almost surely, 2^25787217511 is an apocalyptic number.

25787217511 is a deficient number, since it is larger than the sum of its proper divisors (2477619737).

25787217511 is a wasteful number, since it uses less digits than its factorization.

25787217511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110613.

The product of its digits is 274400, while the sum is 46.

The spelling of 25787217511 in words is "twenty-five billion, seven hundred eighty-seven million, two hundred seventeen thousand, five hundred eleven".