25195865457 has 8 divisors (see below), whose sum is σ = 38393699776. Its totient is φ = 14397637392.

The previous prime is 25195865389. The next prime is 25195865491. The reversal of 25195865457 is 75456859152.

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

It is not a de Polignac number, because 25195865457 - 2¹¹ = 25195863409 is a prime.

It is a super-2 number, since 2×25195865457² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25195865397 and 25195865406.

It is not an unprimeable number, because it can be changed into a prime (25195860457) 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, 599901538 + ... + 599901579.

It is an arithmetic number, because the mean of its divisors is an integer number (4799212472).

Almost surely, 2^25195865457 is an apocalyptic number.

It is an amenable number.

25195865457 is a deficient number, since it is larger than the sum of its proper divisors (13197834319).

25195865457 is a wasteful number, since it uses less digits than its factorization.

25195865457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199803127.

The product of its digits is 15120000, while the sum is 57.

The spelling of 25195865457 in words is "twenty-five billion, one hundred ninety-five million, eight hundred sixty-five thousand, four hundred fifty-seven".