836071872989 has 20 divisors (see below), whose sum is σ = 869100832380. Its totient is φ = 804271201920.

The previous prime is 836071872983. The next prime is 836071872997. The reversal of 836071872989 is 989278170638.

836071872989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 785070425764 + 51001447225 = 886042^2 + 225835^2 .

It is not a de Polignac number, because 836071872989 - 2¹⁶ = 836071807453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (836071872983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 159766517 + ... + 159771749.

It is an arithmetic number, because the mean of its divisors is an integer number (43455041619).

Almost surely, 2^836071872989 is an apocalyptic number.

It is an amenable number.

836071872989 is a deficient number, since it is larger than the sum of its proper divisors (33028959391).

836071872989 is an frugal number, since it uses more digits than its factorization.

836071872989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5530 (or 5437 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 68.

The spelling of 836071872989 in words is "eight hundred thirty-six billion, seventy-one million, eight hundred seventy-two thousand, nine hundred eighty-nine".