1980908105 has 8 divisors (see below), whose sum is σ = 2593188864. Its totient is φ = 1440660400.

The previous prime is 1980908057. The next prime is 1980908123. The reversal of 1980908105 is 5018090891.

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

It is a de Polignac number, because none of the positive numbers 2^k-1980908105 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18008201 + ... + 18008310.

It is an arithmetic number, because the mean of its divisors is an integer number (324148608).

Almost surely, 2^1980908105 is an apocalyptic number.

It is an amenable number.

1980908105 is a deficient number, since it is larger than the sum of its proper divisors (612280759).

1980908105 is a wasteful number, since it uses less digits than its factorization.

1980908105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36016527.

The product of its (nonzero) digits is 25920, while the sum is 41.

The square root of 1980908105 is about 44507.3938239479. The cubic root of 1980908105 is about 1255.8991783599.

Adding to 1980908105 its reverse (5018090891), we get a palindrome (6998998996).

The spelling of 1980908105 in words is "one billion, nine hundred eighty million, nine hundred eight thousand, one hundred five".