1438476781711 has 2 divisors, whose sum is σ = 1438476781712. Its totient is φ = 1438476781710.

The previous prime is 1438476781663. The next prime is 1438476781717. The reversal of 1438476781711 is 1171876748341.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438476781711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438476781717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719238390855 + 719238390856.

It is an arithmetic number, because the mean of its divisors is an integer number (719238390856).

Almost surely, 2^{1438476781711} is an apocalyptic number.

1438476781711 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438476781711 is an equidigital number, since it uses as much as digits as its factorization.

1438476781711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 58.

The spelling of 1438476781711 in words is "one trillion, four hundred thirty-eight billion, four hundred seventy-six million, seven hundred eighty-one thousand, seven hundred eleven".