1377439937813 has 2 divisors, whose sum is σ = 1377439937814. Its totient is φ = 1377439937812.

The previous prime is 1377439937791. The next prime is 1377439937893. The reversal of 1377439937813 is 3187399347731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364917880209 + 12522057604 = 1168297^2 + 111902^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1377439937813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1377439937813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1377439937893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688719968906 + 688719968907.

It is an arithmetic number, because the mean of its divisors is an integer number (688719968907).

Almost surely, 2^{1377439937813} is an apocalyptic number.

It is an amenable number.

1377439937813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377439937813 is an equidigital number, since it uses as much as digits as its factorization.

1377439937813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72013536, while the sum is 65.

The spelling of 1377439937813 in words is "one trillion, three hundred seventy-seven billion, four hundred thirty-nine million, nine hundred thirty-seven thousand, eight hundred thirteen".