1981707030901 has 8 divisors (see below), whose sum is σ = 2134157319224. Its totient is φ = 1829258354880.

The previous prime is 1981707030859. The next prime is 1981707030917. The reversal of 1981707030901 is 1090307071891.

It can be written as a sum of positive squares in 4 ways, for example, as 1113027110001 + 868679920900 = 1055001^2 + 932030^2 .

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 1981707030901 - 2¹⁵ = 1981706998133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981707030601) 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, 3686635 + ... + 4189831.

It is an arithmetic number, because the mean of its divisors is an integer number (266769664903).

Almost surely, 2^{1981707030901} is an apocalyptic number.

It is an amenable number.

1981707030901 is a deficient number, since it is larger than the sum of its proper divisors (152450288323).

1981707030901 is a wasteful number, since it uses less digits than its factorization.

1981707030901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806151.

The product of its (nonzero) digits is 95256, while the sum is 46.

The spelling of 1981707030901 in words is "one trillion, nine hundred eighty-one billion, seven hundred seven million, thirty thousand, nine hundred one".