25115251541511 has 16 divisors (see below), whose sum is σ = 34392295885824. Its totient is φ = 16290860421024.

The previous prime is 25115251541507. The next prime is 25115251541543. The reversal of 25115251541511 is 11514515251152.

It is not a de Polignac number, because 25115251541511 - 2² = 25115251541507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25115251541511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25115251549511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17009410 + ... + 18426896.

It is an arithmetic number, because the mean of its divisors is an integer number (2149518492864).

Almost surely, 2^{25115251541511} is an apocalyptic number.

25115251541511 is a deficient number, since it is larger than the sum of its proper divisors (9277044344313).

25115251541511 is a wasteful number, since it uses less digits than its factorization.

25115251541511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577150.

The product of its digits is 50000, while the sum is 39.

Adding to 25115251541511 its reverse (11514515251152), we get a palindrome (36629766792663).

The spelling of 25115251541511 in words is "twenty-five trillion, one hundred fifteen billion, two hundred fifty-one million, five hundred forty-one thousand, five hundred eleven".