25895667561 has 8 divisors (see below), whose sum is σ = 35330523360. Its totient is φ = 16862295072.

The previous prime is 25895667529. The next prime is 25895667563. The reversal of 25895667561 is 16576659852.

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

It is not a de Polignac number, because 25895667561 - 2⁵ = 25895667529 is a prime.

It is a super-4 number, since 4×25895667561⁴ (a number of 43 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25895667495 and 25895667504.

It is not an unprimeable number, because it can be changed into a prime (25895667563) 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, 100370676 + ... + 100370933.

It is an arithmetic number, because the mean of its divisors is an integer number (4416315420).

Almost surely, 2^25895667561 is an apocalyptic number.

It is an amenable number.

25895667561 is a deficient number, since it is larger than the sum of its proper divisors (9434855799).

25895667561 is a wasteful number, since it uses less digits than its factorization.

25895667561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200741655.

The product of its digits is 27216000, while the sum is 60.

The spelling of 25895667561 in words is "twenty-five billion, eight hundred ninety-five million, six hundred sixty-seven thousand, five hundred sixty-one".