3153981841921 has 8 divisors (see below), whose sum is σ = 3324300967080. Its totient is φ = 2987766792192.

The previous prime is 3153981841849. The next prime is 3153981841963. The reversal of 3153981841921 is 1291481893513.

It can be written as a sum of positive squares in 4 ways, for example, as 938885419521 + 2215096422400 = 968961^2 + 1488320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3153981841921 - 2¹⁹ = 3153981317633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3153981841321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1026017280 + ... + 1026020353.

It is an arithmetic number, because the mean of its divisors is an integer number (415537620885).

Almost surely, 2^{3153981841921} is an apocalyptic number.

It is an amenable number.

3153981841921 is a deficient number, since it is larger than the sum of its proper divisors (170319125159).

3153981841921 is a wasteful number, since it uses less digits than its factorization.

3153981841921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052037715.

The product of its digits is 1866240, while the sum is 55.

The spelling of 3153981841921 in words is "three trillion, one hundred fifty-three billion, nine hundred eighty-one million, eight hundred forty-one thousand, nine hundred twenty-one".