25128005015 has 16 divisors (see below), whose sum is σ = 30715057440. Its totient is φ = 19731402240.

The previous prime is 25128005003. The next prime is 25128005033. The reversal of 25128005015 is 51050082152.

It is a de Polignac number, because none of the positive numbers 2^k-25128005015 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, 145121 + ... + 267050.

It is an arithmetic number, because the mean of its divisors is an integer number (1919691090).

Almost surely, 2^25128005015 is an apocalyptic number.

25128005015 is a deficient number, since it is larger than the sum of its proper divisors (5587052425).

25128005015 is a wasteful number, since it uses less digits than its factorization.

25128005015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412402.

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 25128005015 its reverse (51050082152), we get a palindrome (76178087167).

The spelling of 25128005015 in words is "twenty-five billion, one hundred twenty-eight million, five thousand, fifteen".