1981333361029 has 16 divisors (see below), whose sum is σ = 2288772135936. Its totient is φ = 1695130214400.

The previous prime is 1981333361027. The next prime is 1981333361087. The reversal of 1981333361029 is 9201633331891.

It is a cyclic number.

It is not a de Polignac number, because 1981333361029 - 2¹ = 1981333361027 is a prime.

It is a super-3 number, since 3×1981333361029³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981333361027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2119324 + ... + 2907610.

It is an arithmetic number, because the mean of its divisors is an integer number (143048258496).

Almost surely, 2^{1981333361029} is an apocalyptic number.

It is an amenable number.

1981333361029 is a deficient number, since it is larger than the sum of its proper divisors (307438774907).

1981333361029 is a wasteful number, since it uses less digits than its factorization.

1981333361029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801756.

The product of its (nonzero) digits is 629856, while the sum is 49.

The spelling of 1981333361029 in words is "one trillion, nine hundred eighty-one billion, three hundred thirty-three million, three hundred sixty-one thousand, twenty-nine".