25215882417 has 32 divisors (see below), whose sum is σ = 43150181760. Its totient is φ = 14383388160.

The previous prime is 25215882407. The next prime is 25215882421. The reversal of 25215882417 is 71428851252.

25215882417 is a `hidden beast` number, since 2 + 5 + 2 + 158 + 82 + 417 = 666.

It is not a de Polignac number, because 25215882417 - 2⁴ = 25215882401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25215882407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2492068 + ... + 2502165.

It is an arithmetic number, because the mean of its divisors is an integer number (1348443180).

Almost surely, 2^25215882417 is an apocalyptic number.

25215882417 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

25215882417 is a deficient number, since it is larger than the sum of its proper divisors (17934299343).

25215882417 is a wasteful number, since it uses less digits than its factorization.

25215882417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4994270 (or 4994264 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The spelling of 25215882417 in words is "twenty-five billion, two hundred fifteen million, eight hundred eighty-two thousand, four hundred seventeen".