1377638765011 has 2 divisors, whose sum is σ = 1377638765012. Its totient is φ = 1377638765010.

The previous prime is 1377638764963. The next prime is 1377638765039. The reversal of 1377638765011 is 1105678367731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1377638765011 - 2⁹ = 1377638764499 is a prime.

It is a super-2 number, since 2×1377638765011² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1377638762011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688819382505 + 688819382506.

It is an arithmetic number, because the mean of its divisors is an integer number (688819382506).

Almost surely, 2^{1377638765011} is an apocalyptic number.

1377638765011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377638765011 is an equidigital number, since it uses as much as digits as its factorization.

1377638765011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The spelling of 1377638765011 in words is "one trillion, three hundred seventy-seven billion, six hundred thirty-eight million, seven hundred sixty-five thousand, eleven".