1980926855 has 8 divisors (see below), whose sum is σ = 2379536352. Its totient is φ = 1583125408.

The previous prime is 1980926771. The next prime is 1980926861. The reversal of 1980926855 is 5586290891.

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 1980926855 - 2¹⁴ = 1980910471 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1980926797 and 1980926806.

It is a congruent 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, 196604 + ... + 206433.

It is an arithmetic number, because the mean of its divisors is an integer number (297442044).

Almost surely, 2^1980926855 is an apocalyptic number.

1980926855 is a deficient number, since it is larger than the sum of its proper divisors (398609497).

1980926855 is an equidigital number, since it uses as much as digits as its factorization.

1980926855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404025.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The square root of 1980926855 is about 44507.6044626084. The cubic root of 1980926855 is about 1255.9031408582.

It can be divided in two parts, 19809 and 26855, that added together give a palindrome (46664).

The spelling of 1980926855 in words is "one billion, nine hundred eighty million, nine hundred twenty-six thousand, eight hundred fifty-five".