53842210781 has 4 divisors (see below), whose sum is σ = 53846828700. Its totient is φ = 53837592864.

The previous prime is 53842210759. The next prime is 53842210823. The reversal of 53842210781 is 18701224835.

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 28388880100 + 25453330681 = 168490^2 + 159541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53842210781 is a prime.

It is a super-2 number, since 2×53842210781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53842210381) 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, 2291426 + ... + 2314803.

It is an arithmetic number, because the mean of its divisors is an integer number (13461707175).

Almost surely, 2^53842210781 is an apocalyptic number.

It is an amenable number.

53842210781 is a deficient number, since it is larger than the sum of its proper divisors (4617919).

53842210781 is a wasteful number, since it uses less digits than its factorization.

53842210781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4617918.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 53842210781 in words is "fifty-three billion, eight hundred forty-two million, two hundred ten thousand, seven hundred eighty-one".