25218554087 has 8 divisors (see below), whose sum is σ = 25248167040. Its totient is φ = 25188962040.

The previous prime is 25218554071. The next prime is 25218554117. The reversal of 25218554087 is 78045581252.

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 25218554087 - 2⁴ = 25218554071 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 (25218554057) 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, 3881912 + ... + 3888402.

It is an arithmetic number, because the mean of its divisors is an integer number (3156020880).

Almost surely, 2^25218554087 is an apocalyptic number.

25218554087 is a deficient number, since it is larger than the sum of its proper divisors (29612953).

25218554087 is a wasteful number, since it uses less digits than its factorization.

25218554087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453.

The product of its (nonzero) digits is 896000, while the sum is 47.

The spelling of 25218554087 in words is "twenty-five billion, two hundred eighteen million, five hundred fifty-four thousand, eighty-seven".