36633651921 has 8 divisors (see below), whose sum is σ = 54272076960. Its totient is φ = 24422434596.

The previous prime is 36633651919. The next prime is 36633651949. The reversal of 36633651921 is 12915633663.

36633651921 is a `hidden beast` number, since 3 + 6 + 633 + 6 + 5 + 1 + 9 + 2 + 1 = 666.

It is not a de Polignac number, because 36633651921 - 2¹ = 36633651919 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36633651721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 678400935 + ... + 678400988.

It is an arithmetic number, because the mean of its divisors is an integer number (6784009620).

Almost surely, 2^36633651921 is an apocalyptic number.

It is an amenable number.

36633651921 is a deficient number, since it is larger than the sum of its proper divisors (17638425039).

36633651921 is a wasteful number, since it uses less digits than its factorization.

36633651921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356801932 (or 1356801926 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The spelling of 36633651921 in words is "thirty-six billion, six hundred thirty-three million, six hundred fifty-one thousand, nine hundred twenty-one".