25431411505 has 16 divisors (see below), whose sum is σ = 30767869440. Its totient is φ = 20178638208.

The previous prime is 25431411497. The next prime is 25431411521. The reversal of 25431411505 is 50511413452.

It is a cyclic number.

It is not a de Polignac number, because 25431411505 - 2³ = 25431411497 is a prime.

It is a super-2 number, since 2×25431411505² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 700224 + ... + 735646.

It is an arithmetic number, because the mean of its divisors is an integer number (1922991840).

Almost surely, 2^25431411505 is an apocalyptic number.

It is an amenable number.

25431411505 is a deficient number, since it is larger than the sum of its proper divisors (5336457935).

25431411505 is a wasteful number, since it uses less digits than its factorization.

25431411505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36600.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 25431411505 its reverse (50511413452), we get a palindrome (75942824957).

The spelling of 25431411505 in words is "twenty-five billion, four hundred thirty-one million, four hundred eleven thousand, five hundred five".