25019750065 has 4 divisors (see below), whose sum is σ = 30023700084. Its totient is φ = 20015800048.

The previous prime is 25019750053. The next prime is 25019750141. The reversal of 25019750065 is 56005791052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19085975104 + 5933774961 = 138152^2 + 77031^2 .

It is a cyclic number.

It is not a de Polignac number, because 25019750065 - 2³³ = 16429815473 is a prime.

It is a Duffinian 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, 2501975002 + ... + 2501975011.

It is an arithmetic number, because the mean of its divisors is an integer number (7505925021).

Almost surely, 2^25019750065 is an apocalyptic number.

It is an amenable number.

25019750065 is a deficient number, since it is larger than the sum of its proper divisors (5003950019).

25019750065 is an equidigital number, since it uses as much as digits as its factorization.

25019750065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5003950018.

The product of its (nonzero) digits is 94500, while the sum is 40.

The spelling of 25019750065 in words is "twenty-five billion, nineteen million, seven hundred fifty thousand, sixty-five".