1980012881 has 8 divisors (see below), whose sum is σ = 2468587584. Its totient is φ = 1542867120.

The previous prime is 1980012871. The next prime is 1980012907. The reversal of 1980012881 is 1882100891.

It is a happy number.

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 1980012881 - 2³⁰ = 906271057 is a prime.

It is a super-2 number, since 2×1980012881² = 7840902017851840322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1980012841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12857150 + ... + 12857303.

It is an arithmetic number, because the mean of its divisors is an integer number (308573448).

Almost surely, 2^1980012881 is an apocalyptic number.

1980012881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1980012881 is a deficient number, since it is larger than the sum of its proper divisors (488574703).

1980012881 is a wasteful number, since it uses less digits than its factorization.

1980012881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25714471.

The product of its (nonzero) digits is 9216, while the sum is 38.

The square root of 1980012881 is about 44497.3356618124. The cubic root of 1980012881 is about 1255.7099586624.

The spelling of 1980012881 in words is "one billion, nine hundred eighty million, twelve thousand, eight hundred eighty-one".