25128861411 has 16 divisors (see below), whose sum is σ = 34014587904. Its totient is φ = 16497992544.

The previous prime is 25128861409. The next prime is 25128861437. The reversal of 25128861411 is 11416882152.

It is not a de Polignac number, because 25128861411 - 2¹ = 25128861409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25128861411.

It is not an unprimeable number, because it can be changed into a prime (25128862411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 814381 + ... + 844673.

It is an arithmetic number, because the mean of its divisors is an integer number (2125911744).

Almost surely, 2^25128861411 is an apocalyptic number.

25128861411 is a deficient number, since it is larger than the sum of its proper divisors (8885726493).

25128861411 is a wasteful number, since it uses less digits than its factorization.

25128861411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34490.

The product of its digits is 30720, while the sum is 39.

The spelling of 25128861411 in words is "twenty-five billion, one hundred twenty-eight million, eight hundred sixty-one thousand, four hundred eleven".