25216024465 has 16 divisors (see below), whose sum is σ = 31383190800. Its totient is φ = 19427091712.

The previous prime is 25216024459. The next prime is 25216024507. The reversal of 25216024465 is 56442061252.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4590469009 + 20625555456 = 67753^2 + 143616^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25216024465 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167122 + ... + 279931.

It is an arithmetic number, because the mean of its divisors is an integer number (1961449425).

Almost surely, 2^25216024465 is an apocalyptic number.

It is an amenable number.

25216024465 is a deficient number, since it is larger than the sum of its proper divisors (6167166335).

25216024465 is a wasteful number, since it uses less digits than its factorization.

25216024465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447476.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 25216024465 in words is "twenty-five billion, two hundred sixteen million, twenty-four thousand, four hundred sixty-five".