1377439937791 has 2 divisors, whose sum is σ = 1377439937792. Its totient is φ = 1377439937790.

The previous prime is 1377439937771. The next prime is 1377439937813. The reversal of 1377439937791 is 1977399347731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1377439937791 - 2⁷ = 1377439937663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1377439937791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377439937701) 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, 688719968895 + 688719968896.

It is an arithmetic number, because the mean of its divisors is an integer number (688719968896).

Almost surely, 2^{1377439937791} is an apocalyptic number.

1377439937791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377439937791 is an equidigital number, since it uses as much as digits as its factorization.

1377439937791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189035532, while the sum is 70.

The spelling of 1377439937791 in words is "one trillion, three hundred seventy-seven billion, four hundred thirty-nine million, nine hundred thirty-seven thousand, seven hundred ninety-one".