3445973821881 has 12 divisors (see below), whose sum is σ = 4977915566052. Its totient is φ = 2297132270496.

The previous prime is 3445973821867. The next prime is 3445973821909. The reversal of 3445973821881 is 1881283795443.

3445973821881 is a `hidden beast` number, since 3 + 4 + 4 + 597 + 38 + 2 + 1 + 8 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1434353546025 + 2011620275856 = 1197645^2 + 1418316^2 .

It is not a de Polignac number, because 3445973821881 - 2¹⁸ = 3445973559737 is a prime.

It is a super-2 number, since 2×3445973821881² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3445973821481) 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 11 ways as a sum of consecutive naturals, for example, 15181986 + ... + 15407291.

It is an arithmetic number, because the mean of its divisors is an integer number (414826297171).

Almost surely, 2^{3445973821881} is an apocalyptic number.

It is an amenable number.

3445973821881 is a deficient number, since it is larger than the sum of its proper divisors (1531941744171).

3445973821881 is a wasteful number, since it uses less digits than its factorization.

3445973821881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30601800 (or 30601797 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 3445973821881 in words is "three trillion, four hundred forty-five billion, nine hundred seventy-three million, eight hundred twenty-one thousand, eight hundred eighty-one".