25418531087 has 8 divisors (see below), whose sum is σ = 27315437616. Its totient is φ = 23566257792.

The previous prime is 25418531069. The next prime is 25418531111. The reversal of 25418531087 is 78013581452.

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 25418531087 - 2¹⁶ = 25418465551 is a prime.

It is a super-2 number, since 2×25418531087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25418531027) 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, 11157128 + ... + 11159405.

It is an arithmetic number, because the mean of its divisors is an integer number (3414429702).

Almost surely, 2^25418531087 is an apocalyptic number.

25418531087 is a deficient number, since it is larger than the sum of its proper divisors (1896906529).

25418531087 is a wasteful number, since it uses less digits than its factorization.

25418531087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22316617.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 25418531087 in words is "twenty-five billion, four hundred eighteen million, five hundred thirty-one thousand, eighty-seven".