1980841601 has 4 divisors (see below), whose sum is σ = 1995092400. Its totient is φ = 1966590804.

The previous prime is 1980841579. The next prime is 1980841619. The reversal of 1980841601 is 1061480891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1061480891 = 167 ⋅6356173.

It is a cyclic number.

It is not a de Polignac number, because 1980841601 - 2⁶ = 1980841537 is a prime.

It is a super-3 number, since 3×1980841601³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980840601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125191 + ... + 7125468.

It is an arithmetic number, because the mean of its divisors is an integer number (498773100).

Almost surely, 2^1980841601 is an apocalyptic number.

It is an amenable number.

1980841601 is a deficient number, since it is larger than the sum of its proper divisors (14250799).

1980841601 is a wasteful number, since it uses less digits than its factorization.

1980841601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14250798.

The product of its (nonzero) digits is 13824, while the sum is 38.

The square root of 1980841601 is about 44506.6467058573. The cubic root of 1980841601 is about 1255.8851236521.

The spelling of 1980841601 in words is "one billion, nine hundred eighty million, eight hundred forty-one thousand, six hundred one".