25640128213 has 8 divisors (see below), whose sum is σ = 29391535040. Its totient is φ = 21910854240.

The previous prime is 25640128211. The next prime is 25640128247. The reversal of 25640128213 is 31282104652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25640128213 - 2¹ = 25640128211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25640128211) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5530728 + ... + 5535361.

It is an arithmetic number, because the mean of its divisors is an integer number (3673941880).

Almost surely, 2^25640128213 is an apocalyptic number.

It is an amenable number.

25640128213 is a deficient number, since it is larger than the sum of its proper divisors (3751406827).

25640128213 is a wasteful number, since it uses less digits than its factorization.

25640128213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11066427.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 25640128213 in words is "twenty-five billion, six hundred forty million, one hundred twenty-eight thousand, two hundred thirteen".