52781027981 has 16 divisors (see below), whose sum is σ = 58991613120. Its totient is φ = 46808603520.

The previous prime is 52781027977. The next prime is 52781027983. The reversal of 52781027981 is 18972018725.

It is a cyclic number.

It is not a de Polignac number, because 52781027981 - 2² = 52781027977 is a prime.

It is a super-2 number, since 2×52781027981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52781027983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313691 + ... + 451623.

It is an arithmetic number, because the mean of its divisors is an integer number (3686975820).

Almost surely, 2^52781027981 is an apocalyptic number.

It is an amenable number.

52781027981 is a deficient number, since it is larger than the sum of its proper divisors (6210585139).

52781027981 is a wasteful number, since it uses less digits than its factorization.

52781027981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138796.

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 52781027981 in words is "fifty-two billion, seven hundred eighty-one million, twenty-seven thousand, nine hundred eighty-one".