1863024769981 has 2 divisors, whose sum is σ = 1863024769982. Its totient is φ = 1863024769980.

The previous prime is 1863024769897. The next prime is 1863024770023. The reversal of 1863024769981 is 1899674203681.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185463664100 + 677561105881 = 1088790^2 + 823141^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1863024769981 is a prime.

It is a super-2 number, since 2×1863024769981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1863024769681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 931512384990 + 931512384991.

It is an arithmetic number, because the mean of its divisors is an integer number (931512384991).

Almost surely, 2^{1863024769981} is an apocalyptic number.

It is an amenable number.

1863024769981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863024769981 is an equidigital number, since it uses as much as digits as its factorization.

1863024769981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31352832, while the sum is 64.

The spelling of 1863024769981 in words is "one trillion, eight hundred sixty-three billion, twenty-four million, seven hundred sixty-nine thousand, nine hundred eighty-one".