254721327613 has 12 divisors (see below), whose sum is σ = 266657924988. Its totient is φ = 243298563200.

The previous prime is 254721327607. The next prime is 254721327629. The reversal of 254721327613 is 316723127452.

It can be written as a sum of positive squares in 2 ways, for example, as 232822655289 + 21898672324 = 482517^2 + 147982^2 .

It is not a de Polignac number, because 254721327613 - 2⁹ = 254721327101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 254721327613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (254721322613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27381 + ... + 714277.

It is an arithmetic number, because the mean of its divisors is an integer number (22221493749).

Almost surely, 2^254721327613 is an apocalyptic number.

254721327613 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

254721327613 is a deficient number, since it is larger than the sum of its proper divisors (11936597375).

254721327613 is an equidigital number, since it uses as much as digits as its factorization.

254721327613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687644 (or 687621 counting only the distinct ones).

The product of its digits is 423360, while the sum is 43.

The spelling of 254721327613 in words is "two hundred fifty-four billion, seven hundred twenty-one million, three hundred twenty-seven thousand, six hundred thirteen".