253939486171 has 4 divisors (see below), whose sum is σ = 290216555632. Its totient is φ = 217662416712.

The previous prime is 253939486139. The next prime is 253939486183. The reversal of 253939486171 is 171684939352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 253939486171 - 2⁵ = 253939486139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253939286171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18138534720 + ... + 18138534733.

It is an arithmetic number, because the mean of its divisors is an integer number (72554138908).

Almost surely, 2^253939486171 is an apocalyptic number.

253939486171 is a deficient number, since it is larger than the sum of its proper divisors (36277069461).

253939486171 is an equidigital number, since it uses as much as digits as its factorization.

253939486171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36277069460.

The product of its digits is 9797760, while the sum is 58.

The spelling of 253939486171 in words is "two hundred fifty-three billion, nine hundred thirty-nine million, four hundred eighty-six thousand, one hundred seventy-one".