1377965422881 has 20 divisors (see below), whose sum is σ = 2069107701892. Its totient is φ = 913883793408.

The previous prime is 1377965422807. The next prime is 1377965422997. The reversal of 1377965422881 is 1882245697731.

1377965422881 is a `hidden beast` number, since 1 + 3 + 7 + 7 + 9 + 6 + 542 + 2 + 8 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 164462691600 + 1213502731281 = 405540^2 + 1101591^2 .

It is not a de Polignac number, because 1377965422881 - 2¹¹ = 1377965420833 is a prime.

It is a super-2 number, since 2×1377965422881² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1377965422781) 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 19 ways as a sum of consecutive naturals, for example, 44056696 + ... + 44087961.

Almost surely, 2^{1377965422881} is an apocalyptic number.

It is an amenable number.

1377965422881 is a deficient number, since it is larger than the sum of its proper divisors (691142279011).

1377965422881 is an equidigital number, since it uses as much as digits as its factorization.

1377965422881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88144862 (or 88144853 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 63.

The spelling of 1377965422881 in words is "one trillion, three hundred seventy-seven billion, nine hundred sixty-five million, four hundred twenty-two thousand, eight hundred eighty-one".