3775127912981 has 2 divisors, whose sum is σ = 3775127912982. Its totient is φ = 3775127912980.

The previous prime is 3775127912891. The next prime is 3775127912987. The reversal of 3775127912981 is 1892197215773.

3775127912981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (3775127912891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1993546324900 + 1781581588081 = 1411930^2 + 1334759^2 .

It is a cyclic number.

It is not a de Polignac number, because 3775127912981 - 2³⁰ = 3774054171157 is a prime.

It is a super-2 number, since 2×3775127912981² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3775127912987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1887563956490 + 1887563956491.

It is an arithmetic number, because the mean of its divisors is an integer number (1887563956491).

Almost surely, 2^{3775127912981} is an apocalyptic number.

It is an amenable number.

3775127912981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3775127912981 is an equidigital number, since it uses as much as digits as its factorization.

3775127912981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13335840, while the sum is 62.

The spelling of 3775127912981 in words is "three trillion, seven hundred seventy-five billion, one hundred twenty-seven million, nine hundred twelve thousand, nine hundred eighty-one".