25521486267 has 4 divisors (see below), whose sum is σ = 34028648360. Its totient is φ = 17014324176.

The previous prime is 25521486253. The next prime is 25521486311. The reversal of 25521486267 is 76268412552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25521486267 - 2¹⁰ = 25521485243 is a prime.

It is a super-2 number, since 2×25521486267² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25521486167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4253581042 + ... + 4253581047.

It is an arithmetic number, because the mean of its divisors is an integer number (8507162090).

Almost surely, 2^25521486267 is an apocalyptic number.

25521486267 is a deficient number, since it is larger than the sum of its proper divisors (8507162093).

25521486267 is an equidigital number, since it uses as much as digits as its factorization.

25521486267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507162092.

The product of its digits is 1612800, while the sum is 48.

The spelling of 25521486267 in words is "twenty-five billion, five hundred twenty-one million, four hundred eighty-six thousand, two hundred sixty-seven".