1881807072849 has 36 divisors (see below), whose sum is σ = 3163485134628. Its totient is φ = 1073401528320.

The previous prime is 1881807072841. The next prime is 1881807072857. The reversal of 1881807072849 is 9482707081881.

It is an interprime number because it is at equal distance from previous prime (1881807072841) and next prime (1881807072857).

It can be written as a sum of positive squares in 2 ways, for example, as 1589445175824 + 292361897025 = 1260732^2 + 540705^2 .

It is not a de Polignac number, because 1881807072849 - 2³ = 1881807072841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1881807072841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 50805424 + ... + 50842449.

It is an arithmetic number, because the mean of its divisors is an integer number (87874587073).

Almost surely, 2^{1881807072849} is an apocalyptic number.

It is an amenable number.

1881807072849 is a deficient number, since it is larger than the sum of its proper divisors (1281678061779).

1881807072849 is a wasteful number, since it uses less digits than its factorization.

1881807072849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101647918 (or 101647904 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 63.

The spelling of 1881807072849 in words is "one trillion, eight hundred eighty-one billion, eight hundred seven million, seventy-two thousand, eight hundred forty-nine".