25606415215 has 16 divisors (see below), whose sum is σ = 32463607680. Its totient is φ = 19357918720.

The previous prime is 25606415209. The next prime is 25606415227. The reversal of 25606415215 is 51251460652.

It is a de Polignac number, because none of the positive numbers 2^k-25606415215 is a prime.

It is a congruent number.

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, 1871866 + ... + 1885495.

It is an arithmetic number, because the mean of its divisors is an integer number (2028975480).

Almost surely, 2^25606415215 is an apocalyptic number.

25606415215 is a deficient number, since it is larger than the sum of its proper divisors (6857192465).

25606415215 is a wasteful number, since it uses less digits than its factorization.

25606415215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3757442.

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 25606415215 its reverse (51251460652), we get a palindrome (76857875867).

The spelling of 25606415215 in words is "twenty-five billion, six hundred six million, four hundred fifteen thousand, two hundred fifteen".