83215088905 has 16 divisors (see below), whose sum is σ = 107622267984. Its totient is φ = 61403846400.

The previous prime is 83215088903. The next prime is 83215088921. The reversal of 83215088905 is 50988051238.

It can be written as a sum of positive squares in 8 ways, for example, as 18934585609 + 64280503296 = 137603^2 + 253536^2 .

It is not a de Polignac number, because 83215088905 - 2¹ = 83215088903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83215088903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407454 + ... + 576583.

It is an arithmetic number, because the mean of its divisors is an integer number (6726391749).

Almost surely, 2^83215088905 is an apocalyptic number.

It is an amenable number.

83215088905 is a deficient number, since it is larger than the sum of its proper divisors (24407179079).

83215088905 is a wasteful number, since it uses less digits than its factorization.

83215088905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985356.

The product of its (nonzero) digits is 691200, while the sum is 49.

The spelling of 83215088905 in words is "eighty-three billion, two hundred fifteen million, eighty-eight thousand, nine hundred five".