25511646287 has 8 divisors (see below), whose sum is σ = 25608541920. Its totient is φ = 25414846560.

The previous prime is 25511646269. The next prime is 25511646319. The reversal of 25511646287 is 78264611552.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25511646287 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 (25511646217) 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, 533453 + ... + 579305.

It is an arithmetic number, because the mean of its divisors is an integer number (3201067740).

Almost surely, 2^25511646287 is an apocalyptic number.

25511646287 is a deficient number, since it is larger than the sum of its proper divisors (96895633).

25511646287 is a wasteful number, since it uses less digits than its factorization.

25511646287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47953.

The product of its digits is 806400, while the sum is 47.

The spelling of 25511646287 in words is "twenty-five billion, five hundred eleven million, six hundred forty-six thousand, two hundred eighty-seven".