36029991681 has 6 divisors (see below), whose sum is σ = 52043321330. Its totient is φ = 24019994448.

The previous prime is 36029991667. The next prime is 36029991689. The reversal of 36029991681 is 18619992063.

It can be written as a sum of positive squares in only one way, i.e., 22038887025 + 13991104656 = 148455^2 + 118284^2 .

It is not a de Polignac number, because 36029991681 - 2¹⁷ = 36029860609 is a prime.

It is a super-2 number, since 2×36029991681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36029991689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2001666196 + ... + 2001666213.

Almost surely, 2^36029991681 is an apocalyptic number.

It is an amenable number.

36029991681 is a deficient number, since it is larger than the sum of its proper divisors (16013329649).

36029991681 is a wasteful number, since it uses less digits than its factorization.

36029991681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003332415 (or 4003332412 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The spelling of 36029991681 in words is "thirty-six billion, twenty-nine million, nine hundred ninety-one thousand, six hundred eighty-one".