25184381965 has 4 divisors (see below), whose sum is σ = 30221258364. Its totient is φ = 20147505568.

The previous prime is 25184381947. The next prime is 25184381983. The reversal of 25184381965 is 56918348152.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (25184381947) and next prime (25184381983).

It can be written as a sum of positive squares in 2 ways, for example, as 14461986564 + 10722395401 = 120258^2 + 103549^2 .

It is a cyclic number.

It is not a de Polignac number, because 25184381965 - 2¹⁷ = 25184250893 is a prime.

It is a super-2 number, since 2×25184381965² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2518438192 + ... + 2518438201.

It is an arithmetic number, because the mean of its divisors is an integer number (7555314591).

Almost surely, 2^25184381965 is an apocalyptic number.

It is an amenable number.

25184381965 is a deficient number, since it is larger than the sum of its proper divisors (5036876399).

25184381965 is an equidigital number, since it uses as much as digits as its factorization.

25184381965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036876398.

The product of its digits is 2073600, while the sum is 52.

The spelling of 25184381965 in words is "twenty-five billion, one hundred eighty-four million, three hundred eighty-one thousand, nine hundred sixty-five".