37320216561 has 16 divisors (see below), whose sum is σ = 55327849920. Its totient is φ = 24862756320.

The previous prime is 37320216523. The next prime is 37320216581. The reversal of 37320216561 is 16561202373.

37320216561 is a `hidden beast` number, since 3 + 73 + 2 + 0 + 21 + 6 + 561 = 666.

It is not a de Polignac number, because 37320216561 - 2²² = 37316022257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (37320216581) 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, 443595 + ... + 520976.

It is an arithmetic number, because the mean of its divisors is an integer number (3457990620).

Almost surely, 2^37320216561 is an apocalyptic number.

It is an amenable number.

37320216561 is a deficient number, since it is larger than the sum of its proper divisors (18007633359).

37320216561 is a wasteful number, since it uses less digits than its factorization.

37320216561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966013 (or 966007 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 37320216561 in words is "thirty-seven billion, three hundred twenty million, two hundred sixteen thousand, five hundred sixty-one".