83011578885 has 24 divisors (see below), whose sum is σ = 143902875480. Its totient is φ = 44267876352.

The previous prime is 83011578851. The next prime is 83011578889. The reversal of 83011578885 is 58887511038.

It can be written as a sum of positive squares in 4 ways, for example, as 46923357924 + 36088220961 = 216618^2 + 189969^2 .

It is not a de Polignac number, because 83011578885 - 2¹⁰ = 83011577861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83011578889) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321381 + ... + 518949.

It is an arithmetic number, because the mean of its divisors is an integer number (5995953145).

Almost surely, 2^83011578885 is an apocalyptic number.

It is an amenable number.

83011578885 is a deficient number, since it is larger than the sum of its proper divisors (60891296595).

83011578885 is a wasteful number, since it uses less digits than its factorization.

83011578885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206917 (or 206914 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 54.

The spelling of 83011578885 in words is "eighty-three billion, eleven million, five hundred seventy-eight thousand, eight hundred eighty-five".