36388534721 has 16 divisors (see below), whose sum is σ = 46332794880. Its totient is φ = 27751408080.

The previous prime is 36388534709. The next prime is 36388534727. The reversal of 36388534721 is 12743588363.

It is not a de Polignac number, because 36388534721 - 2¹⁰ = 36388533697 is a prime.

It is a super-3 number, since 3×36388534721³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36388534721.

It is not an unprimeable number, because it can be changed into a prime (36388534727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5023811 + ... + 5031048.

It is an arithmetic number, because the mean of its divisors is an integer number (2895799680).

Almost surely, 2^36388534721 is an apocalyptic number.

It is an amenable number.

36388534721 is a deficient number, since it is larger than the sum of its proper divisors (9944260159).

36388534721 is a wasteful number, since it uses less digits than its factorization.

36388534721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054924.

The product of its digits is 2903040, while the sum is 50.

The spelling of 36388534721 in words is "thirty-six billion, three hundred eighty-eight million, five hundred thirty-four thousand, seven hundred twenty-one".