52778536681 has 8 divisors (see below), whose sum is σ = 56900285120. Its totient is φ = 48665625552.

The previous prime is 52778536667. The next prime is 52778536721. The reversal of 52778536681 is 18663587725.

It is a happy number.

52778536681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52778536681 - 2⁵ = 52778536649 is a prime.

It is a super-2 number, since 2×52778536681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52778536781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2196915 + ... + 2220808.

It is an arithmetic number, because the mean of its divisors is an integer number (7112535640).

Almost surely, 2^52778536681 is an apocalyptic number.

It is an amenable number.

52778536681 is a deficient number, since it is larger than the sum of its proper divisors (4121748439).

52778536681 is a wasteful number, since it uses less digits than its factorization.

52778536681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418655.

The product of its digits is 16934400, while the sum is 58.

The spelling of 52778536681 in words is "fifty-two billion, seven hundred seventy-eight million, five hundred thirty-six thousand, six hundred eighty-one".