3549732572521 has 2 divisors, whose sum is σ = 3549732572522. Its totient is φ = 3549732572520.

The previous prime is 3549732572501. The next prime is 3549732572611. The reversal of 3549732572521 is 1252752379453.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2606726495296 + 943006077225 = 1614536^2 + 971085^2 .

It is a cyclic number.

It is not a de Polignac number, because 3549732572521 - 2¹¹ = 3549732570473 is a prime.

It is not a weakly prime, because it can be changed into another prime (3549732572501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1774866286260 + 1774866286261.

It is an arithmetic number, because the mean of its divisors is an integer number (1774866286261).

Almost surely, 2^{3549732572521} is an apocalyptic number.

It is an amenable number.

3549732572521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3549732572521 is an equidigital number, since it uses as much as digits as its factorization.

3549732572521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876000, while the sum is 55.

The spelling of 3549732572521 in words is "three trillion, five hundred forty-nine billion, seven hundred thirty-two million, five hundred seventy-two thousand, five hundred twenty-one".