1438623506377 has 2 divisors, whose sum is σ = 1438623506378. Its totient is φ = 1438623506376.

The previous prime is 1438623506371. The next prime is 1438623506381. The reversal of 1438623506377 is 7736053268341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1356908138496 + 81715367881 = 1164864^2 + 285859^2 .

It is a cyclic number.

It is not a de Polignac number, because 1438623506377 - 2¹⁹ = 1438622982089 is a prime.

It is a super-2 number, since 2×1438623506377² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1438623506371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719311753188 + 719311753189.

It is an arithmetic number, because the mean of its divisors is an integer number (719311753189).

Almost surely, 2^{1438623506377} is an apocalyptic number.

It is an amenable number.

1438623506377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438623506377 is an equidigital number, since it uses as much as digits as its factorization.

1438623506377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 1438623506377 in words is "one trillion, four hundred thirty-eight billion, six hundred twenty-three million, five hundred six thousand, three hundred seventy-seven".