25555536213 has 4 divisors (see below), whose sum is σ = 34074048288. Its totient is φ = 17037024140.

The previous prime is 25555536203. The next prime is 25555536217. The reversal of 25555536213 is 31263555552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25555536213 is a prime.

It is a super-2 number, since 2×25555536213² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25555536217) 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 3 ways as a sum of consecutive naturals, for example, 4259256033 + ... + 4259256038.

It is an arithmetic number, because the mean of its divisors is an integer number (8518512072).

Almost surely, 2^25555536213 is an apocalyptic number.

It is an amenable number.

25555536213 is a deficient number, since it is larger than the sum of its proper divisors (8518512075).

25555536213 is an equidigital number, since it uses as much as digits as its factorization.

25555536213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518512074.

The product of its digits is 675000, while the sum is 42.

The spelling of 25555536213 in words is "twenty-five billion, five hundred fifty-five million, five hundred thirty-six thousand, two hundred thirteen".