1980558611 has 8 divisors (see below), whose sum is σ = 1994296224. Its totient is φ = 1966835520.

The previous prime is 1980558581. The next prime is 1980558631. The reversal of 1980558611 is 1168550891.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1980558611 is a prime.

It is a super-2 number, since 2×1980558611² = 7845224823212498642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1980558631) 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, 549431 + ... + 553023.

It is an arithmetic number, because the mean of its divisors is an integer number (249287028).

Almost surely, 2^1980558611 is an apocalyptic number.

1980558611 is a deficient number, since it is larger than the sum of its proper divisors (13737613).

1980558611 is a wasteful number, since it uses less digits than its factorization.

1980558611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7261.

The product of its (nonzero) digits is 86400, while the sum is 44.

The square root of 1980558611 is about 44503.4674042372. The cubic root of 1980558611 is about 1255.8253140814.

The spelling of 1980558611 in words is "one billion, nine hundred eighty million, five hundred fifty-eight thousand, six hundred eleven".