25601280015 has 48 divisors (see below), whose sum is σ = 42617038464. Its totient is φ = 13116620160.

The previous prime is 25601279989. The next prime is 25601280041. The reversal of 25601280015 is 51008210652.

It is a Cunningham number, because it is equal to 160004²-1.

It is an interprime number because it is at equal distance from previous prime (25601279989) and next prime (25601280041).

It is not a de Polignac number, because 25601280015 - 2¹³ = 25601271823 is a prime.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 2394712 + ... + 2405378.

It is an arithmetic number, because the mean of its divisors is an integer number (887854968).

Almost surely, 2^25601280015 is an apocalyptic number.

25601280015 is a deficient number, since it is larger than the sum of its proper divisors (17015758449).

25601280015 is a wasteful number, since it uses less digits than its factorization.

25601280015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10840 (or 10779 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 25601280015 its reverse (51008210652), we get a palindrome (76609490667).

The spelling of 25601280015 in words is "twenty-five billion, six hundred one million, two hundred eighty thousand, fifteen".