1980594181 has 8 divisors (see below), whose sum is σ = 2099837600. Its totient is φ = 1862850960.

The previous prime is 1980594157. The next prime is 1980594199. The reversal of 1980594181 is 1814950891.

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 1980594181 - 2¹⁹ = 1980069893 is a prime.

It is a super-2 number, since 2×1980594181² = 7845506619622121522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980594881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372330 + ... + 377611.

It is an arithmetic number, because the mean of its divisors is an integer number (262479700).

Almost surely, 2^1980594181 is an apocalyptic number.

It is an amenable number.

1980594181 is a deficient number, since it is larger than the sum of its proper divisors (119243419).

1980594181 is a wasteful number, since it uses less digits than its factorization.

1980594181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750099.

The product of its (nonzero) digits is 103680, while the sum is 46.

The square root of 1980594181 is about 44503.8670342252. The cubic root of 1980594181 is about 1255.8328320680.

The spelling of 1980594181 in words is "one billion, nine hundred eighty million, five hundred ninety-four thousand, one hundred eighty-one".