25665234405 has 32 divisors (see below), whose sum is σ = 41312747520. Its totient is φ = 13605453120.

The previous prime is 25665234403. The next prime is 25665234437. The reversal of 25665234405 is 50443256652.

It is not a de Polignac number, because 25665234405 - 2¹ = 25665234403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25665234403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4532466 + ... + 4538124.

It is an arithmetic number, because the mean of its divisors is an integer number (1291023360).

Almost surely, 2^25665234405 is an apocalyptic number.

It is an amenable number.

25665234405 is a deficient number, since it is larger than the sum of its proper divisors (15647513115).

25665234405 is a wasteful number, since it uses less digits than its factorization.

25665234405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7441.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 25665234405 in words is "twenty-five billion, six hundred sixty-five million, two hundred thirty-four thousand, four hundred five".