873966543381 has 12 divisors (see below), whose sum is σ = 1262467746540. Its totient is φ = 582611303040.

The previous prime is 873966543347. The next prime is 873966543383. The reversal of 873966543381 is 183345669378.

873966543381 is a `hidden beast` number, since 8 + 7 + 3 + 9 + 6 + 6 + 543 + 3 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 637508030481 + 236458512900 = 798441^2 + 486270^2 .

It is not a de Polignac number, because 873966543381 - 2⁷ = 873966543253 is a prime.

It is a super-2 number, since 2×873966543381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873966543383) 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, 2586966 + ... + 2905223.

It is an arithmetic number, because the mean of its divisors is an integer number (105205645545).

Almost surely, 2^873966543381 is an apocalyptic number.

It is an amenable number.

873966543381 is a deficient number, since it is larger than the sum of its proper divisors (388501203159).

873966543381 is a wasteful number, since it uses less digits than its factorization.

873966543381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5509876 (or 5509873 counting only the distinct ones).

The product of its digits is 78382080, while the sum is 63.

The spelling of 873966543381 in words is "eight hundred seventy-three billion, nine hundred sixty-six million, five hundred forty-three thousand, three hundred eighty-one".