25375750065 has 36 divisors (see below), whose sum is σ = 45674088564. Its totient is φ = 13533715872.

The previous prime is 25375750021. The next prime is 25375750079. The reversal of 25375750065 is 56005757352.

25375750065 is a `hidden beast` number, since 2 + 5 + 37 + 57 + 500 + 65 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13025428641 + 12350321424 = 114129^2 + 111132^2 .

It is not a de Polignac number, because 25375750065 - 2⁷ = 25375749937 is a prime.

It is a super-2 number, since 2×25375750065² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 25375750065.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 353962 + ... + 419571.

Almost surely, 2^25375750065 is an apocalyptic number.

It is an amenable number.

25375750065 is a deficient number, since it is larger than the sum of its proper divisors (20298338499).

25375750065 is an frugal number, since it uses more digits than its factorization.

25375750065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773562 (or 773541 counting only the distinct ones).

The product of its (nonzero) digits is 1102500, while the sum is 45.

The spelling of 25375750065 in words is "twenty-five billion, three hundred seventy-five million, seven hundred fifty thousand, sixty-five".