3531587641921 has 16 divisors (see below), whose sum is σ = 3557944483200. Its totient is φ = 3505310926848.

The previous prime is 3531587641889. The next prime is 3531587641927. The reversal of 3531587641921 is 1291467851353.

It is a cyclic number.

It is not a de Polignac number, because 3531587641921 - 2⁵ = 3531587641889 is a prime.

It is a super-2 number, since 2×3531587641921² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3531587641927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220619700 + ... + 220635706.

It is an arithmetic number, because the mean of its divisors is an integer number (222371530200).

Almost surely, 2^{3531587641921} is an apocalyptic number.

It is an amenable number.

3531587641921 is a deficient number, since it is larger than the sum of its proper divisors (26356841279).

3531587641921 is a wasteful number, since it uses less digits than its factorization.

3531587641921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18408.

The product of its digits is 5443200, while the sum is 55.

The spelling of 3531587641921 in words is "three trillion, five hundred thirty-one billion, five hundred eighty-seven million, six hundred forty-one thousand, nine hundred twenty-one".