1378197503971 has 2 divisors, whose sum is σ = 1378197503972. Its totient is φ = 1378197503970.

The previous prime is 1378197503939. The next prime is 1378197503981. The reversal of 1378197503971 is 1793057918731.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1378197503971 - 2⁵ = 1378197503939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378197503981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689098751985 + 689098751986.

It is an arithmetic number, because the mean of its divisors is an integer number (689098751986).

Almost surely, 2^{1378197503971} is an apocalyptic number.

1378197503971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378197503971 is an equidigital number, since it uses as much as digits as its factorization.

1378197503971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10001880, while the sum is 61.

The spelling of 1378197503971 in words is "one trillion, three hundred seventy-eight billion, one hundred ninety-seven million, five hundred three thousand, nine hundred seventy-one".