1377478780771 has 2 divisors, whose sum is σ = 1377478780772. Its totient is φ = 1377478780770.

The previous prime is 1377478780759. The next prime is 1377478780789. The reversal of 1377478780771 is 1770878747731.

It is a weak prime.

It is an emirp because it is prime and its reverse (1770878747731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1377478780771 - 2⁹ = 1377478780259 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1377478780697 and 1377478780706.

It is not a weakly prime, because it can be changed into another prime (1377478783771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 688739390385 + 688739390386.

It is an arithmetic number, because the mean of its divisors is an integer number (688739390386).

Almost surely, 2^{1377478780771} is an apocalyptic number.

1377478780771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1377478780771 is an equidigital number, since it uses as much as digits as its factorization.

1377478780771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90354432, while the sum is 67.

The spelling of 1377478780771 in words is "one trillion, three hundred seventy-seven billion, four hundred seventy-eight million, seven hundred eighty thousand, seven hundred seventy-one".