53071838581 has 4 divisors (see below), whose sum is σ = 53072801964. Its totient is φ = 53070875200.

The previous prime is 53071838557. The next prime is 53071838587. The reversal of 53071838581 is 18583817035.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14012640625 + 39059197956 = 118375^2 + 197634^2 .

It is a cyclic number.

It is not a de Polignac number, because 53071838581 - 2⁵ = 53071838549 is a prime.

It is a super-2 number, since 2×53071838581² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53071838587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393700 + ... + 511021.

It is an arithmetic number, because the mean of its divisors is an integer number (13268200491).

Almost surely, 2^53071838581 is an apocalyptic number.

It is an amenable number.

53071838581 is a deficient number, since it is larger than the sum of its proper divisors (963383).

53071838581 is an equidigital number, since it uses as much as digits as its factorization.

53071838581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963382.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 53071838581 in words is "fifty-three billion, seventy-one million, eight hundred thirty-eight thousand, five hundred eighty-one".