1881001863 has 12 divisors (see below), whose sum is σ = 2926003080. Its totient is φ = 1157539536.

The previous prime is 1881001861. The next prime is 1881001879. The reversal of 1881001863 is 3681001881.

It is not a de Polignac number, because 1881001863 - 2¹ = 1881001861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1881001861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8038353 + ... + 8038586.

It is an arithmetic number, because the mean of its divisors is an integer number (243833590).

Almost surely, 2^1881001863 is an apocalyptic number.

1881001863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1881001863 is a deficient number, since it is larger than the sum of its proper divisors (1045001217).

1881001863 is a wasteful number, since it uses less digits than its factorization.

1881001863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16076958 (or 16076955 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1881001863 is about 43370.5183621317. The cubic root of 1881001863 is about 1234.4203572955.

The spelling of 1881001863 in words is "one billion, eight hundred eighty-one million, one thousand, eight hundred sixty-three".