36368720661 has 24 divisors (see below), whose sum is σ = 60747756384. Its totient is φ = 19183500000.

The previous prime is 36368720651. The next prime is 36368720683. The reversal of 36368720661 is 16602786363.

It is a happy number.

It is not a de Polignac number, because 36368720661 - 2¹⁵ = 36368687893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36368720661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36368720651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9513715 + ... + 9517536.

It is an arithmetic number, because the mean of its divisors is an integer number (2531156516).

Almost surely, 2^36368720661 is an apocalyptic number.

It is an amenable number.

36368720661 is a deficient number, since it is larger than the sum of its proper divisors (24379035723).

36368720661 is a wasteful number, since it uses less digits than its factorization.

36368720661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19031281 (or 19031274 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 48.

The spelling of 36368720661 in words is "thirty-six billion, three hundred sixty-eight million, seven hundred twenty thousand, six hundred sixty-one".