3973018600521 has 6 divisors (see below), whose sum is σ = 5738804645210. Its totient is φ = 2648679067008.

The previous prime is 3973018600511. The next prime is 3973018600541. The reversal of 3973018600521 is 1250068103793.

3973018600521 is a `hidden beast` number, since 3 + 9 + 7 + 3 + 0 + 18 + 600 + 5 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3058088090121 + 914930510400 = 1748739^2 + 956520^2 .

It is not a de Polignac number, because 3973018600521 - 2¹⁹ = 3973018076233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3973018600511) 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 5 ways as a sum of consecutive naturals, for example, 220723255576 + ... + 220723255593.

Almost surely, 2^{3973018600521} is an apocalyptic number.

It is an amenable number.

3973018600521 is a deficient number, since it is larger than the sum of its proper divisors (1765786044689).

3973018600521 is a wasteful number, since it uses less digits than its factorization.

3973018600521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441446511175 (or 441446511172 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 3973018600521 in words is "three trillion, nine hundred seventy-three billion, eighteen million, six hundred thousand, five hundred twenty-one".