25255624065 has 128 divisors (see below), whose sum is σ = 49816166400. Its totient is φ = 10663833600.

The previous prime is 25255624063. The next prime is 25255624067. The reversal of 25255624065 is 56042655252.

It is an interprime number because it is at equal distance from previous prime (25255624063) and next prime (25255624067).

It is not a de Polignac number, because 25255624065 - 2¹ = 25255624063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25255624063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 44230230 + ... + 44230800.

It is an arithmetic number, because the mean of its divisors is an integer number (389188800).

Almost surely, 2^25255624065 is an apocalyptic number.

It is an amenable number.

25255624065 is a deficient number, since it is larger than the sum of its proper divisors (24560542335).

25255624065 is a wasteful number, since it uses less digits than its factorization.

25255624065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023.

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 25255624065 in words is "twenty-five billion, two hundred fifty-five million, six hundred twenty-four thousand, sixty-five".