253556385671 has 4 divisors (see below), whose sum is σ = 253567737144. Its totient is φ = 253545034200.

The previous prime is 253556385631. The next prime is 253556385701. The reversal of 253556385671 is 176583655352.

253556385671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-253556385671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253556385611) 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, 5642165 + ... + 5686926.

It is an arithmetic number, because the mean of its divisors is an integer number (63391934286).

Almost surely, 2^253556385671 is an apocalyptic number.

253556385671 is a deficient number, since it is larger than the sum of its proper divisors (11351473).

253556385671 is a wasteful number, since it uses less digits than its factorization.

253556385671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11351472.

The product of its digits is 22680000, while the sum is 56.

The spelling of 253556385671 in words is "two hundred fifty-three billion, five hundred fifty-six million, three hundred eighty-five thousand, six hundred seventy-one".