25155540112505 has 32 divisors (see below), whose sum is σ = 34674529904640. Its totient is φ = 17326828601280.

The previous prime is 25155540112499. The next prime is 25155540112523. The reversal of 25155540112505 is 50521104555152.

It is not a de Polignac number, because 25155540112505 - 2¹⁶ = 25155540046969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 149537 + ... + 7094606.

It is an arithmetic number, because the mean of its divisors is an integer number (1083579059520).

Almost surely, 2^{25155540112505} is an apocalyptic number.

It is an amenable number.

25155540112505 is a deficient number, since it is larger than the sum of its proper divisors (9518989792135).

25155540112505 is a wasteful number, since it uses less digits than its factorization.

25155540112505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247501.

The product of its (nonzero) digits is 250000, while the sum is 41.

Adding to 25155540112505 its reverse (50521104555152), we get a palindrome (75676644667657).

The spelling of 25155540112505 in words is "twenty-five trillion, one hundred fifty-five billion, five hundred forty million, one hundred twelve thousand, five hundred five".