1980161599 has 8 divisors (see below), whose sum is σ = 2168626320. Its totient is φ = 1796860416.

The previous prime is 1980161591. The next prime is 1980161629. The reversal of 1980161599 is 9951610891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1980161599 - 2³ = 1980161591 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 (1980161591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290082 + ... + 1291615.

It is an arithmetic number, because the mean of its divisors is an integer number (271078290).

Almost surely, 2^1980161599 is an apocalyptic number.

1980161599 is a deficient number, since it is larger than the sum of its proper divisors (188464721).

1980161599 is a wasteful number, since it uses less digits than its factorization.

1980161599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581769.

The product of its (nonzero) digits is 174960, while the sum is 49.

The square root of 1980161599 is about 44499.0067192516. The cubic root of 1980161599 is about 1255.7413965047.

The spelling of 1980161599 in words is "one billion, nine hundred eighty million, one hundred sixty-one thousand, five hundred ninety-nine".