1981514404461 has 16 divisors (see below), whose sum is σ = 2706638014080. Its totient is φ = 1288704468480.

The previous prime is 1981514404391. The next prime is 1981514404589. The reversal of 1981514404461 is 1644044151891.

It is not a de Polignac number, because 1981514404461 - 2³⁰ = 1980440662637 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1981514404461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981513404461) 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, 1357480 + ... + 2409518.

It is an arithmetic number, because the mean of its divisors is an integer number (169164875880).

Almost surely, 2^{1981514404461} is an apocalyptic number.

It is an amenable number.

1981514404461 is a deficient number, since it is larger than the sum of its proper divisors (725123609619).

1981514404461 is a wasteful number, since it uses less digits than its factorization.

1981514404461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067396.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 1981514404461 in words is "one trillion, nine hundred eighty-one billion, five hundred fourteen million, four hundred four thousand, four hundred sixty-one".