25487447918687 has 8 divisors (see below), whose sum is σ = 25517409239040. Its totient is φ = 25457502278520.

The previous prime is 25487447918683. The next prime is 25487447918759. The reversal of 25487447918687 is 78681974478452.

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 25487447918687 - 2² = 25487447918683 is a prime.

It is a super-2 number, since 2×25487447918687² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25487447918683) 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, 665639 + ... + 7170632.

It is an arithmetic number, because the mean of its divisors is an integer number (3189676154880).

Almost surely, 2^{25487447918687} is an apocalyptic number.

25487447918687 is a deficient number, since it is larger than the sum of its proper divisors (29961320353).

25487447918687 is a wasteful number, since it uses less digits than its factorization.

25487447918687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840093.

The product of its digits is 6069288960, while the sum is 80.

The spelling of 25487447918687 in words is "twenty-five trillion, four hundred eighty-seven billion, four hundred forty-seven million, nine hundred eighteen thousand, six hundred eighty-seven".