52981139493 has 12 divisors (see below), whose sum is σ = 78596645868. Its totient is φ = 34366144320.

The previous prime is 52981139479. The next prime is 52981139507. The reversal of 52981139493 is 39493118925.

52981139493 is a `hidden beast` number, since 52 + 98 + 1 + 13 + 9 + 493 = 666.

It is an interprime number because it is at equal distance from previous prime (52981139479) and next prime (52981139507).

It can be written as a sum of positive squares in 2 ways, for example, as 41633137764 + 11348001729 = 204042^2 + 106527^2 .

It is not a de Polignac number, because 52981139493 - 2⁵ = 52981139461 is a prime.

It is a super-2 number, since 2×52981139493² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52981139443) 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, 79550928 + ... + 79551593.

It is an arithmetic number, because the mean of its divisors is an integer number (6549720489).

Almost surely, 2^52981139493 is an apocalyptic number.

It is an amenable number.

52981139493 is a deficient number, since it is larger than the sum of its proper divisors (25615506375).

52981139493 is a wasteful number, since it uses less digits than its factorization.

52981139493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159102564 (or 159102561 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The spelling of 52981139493 in words is "fifty-two billion, nine hundred eighty-one million, one hundred thirty-nine thousand, four hundred ninety-three".