936985049581 has 6 divisors (see below), whose sum is σ = 1089962200590. Its totient is φ = 803130042456.

The previous prime is 936985049569. The next prime is 936985049597. The reversal of 936985049581 is 185940589639.

It can be written as a sum of positive squares in only one way, i.e., 743275033956 + 193710015625 = 862134^2 + 440125^2 .

It is not a de Polignac number, because 936985049581 - 2⁹ = 936985049069 is a prime.

It is a super-2 number, since 2×936985049581² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (936985049281) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9561071886 + ... + 9561071983.

It is an arithmetic number, because the mean of its divisors is an integer number (181660366765).

Almost surely, 2^936985049581 is an apocalyptic number.

It is an amenable number.

936985049581 is a deficient number, since it is larger than the sum of its proper divisors (152977151009).

936985049581 is a wasteful number, since it uses less digits than its factorization.

936985049581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19122143883 (or 19122143876 counting only the distinct ones).

The product of its (nonzero) digits is 83980800, while the sum is 67.

The spelling of 936985049581 in words is "nine hundred thirty-six billion, nine hundred eighty-five million, forty-nine thousand, five hundred eighty-one".