5163781391 has 2 divisors, whose sum is σ = 5163781392. Its totient is φ = 5163781390.

The previous prime is 5163781379. The next prime is 5163781397. The reversal of 5163781391 is 1931873615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5163781391 - 2¹⁰ = 5163780367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5163781397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2581890695 + 2581890696.

It is an arithmetic number, because the mean of its divisors is an integer number (2581890696).

Almost surely, 2^5163781391 is an apocalyptic number.

5163781391 is a deficient number, since it is larger than the sum of its proper divisors (1).

5163781391 is an equidigital number, since it uses as much as digits as its factorization.

5163781391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 5163781391 is about 71859.4558217636. The cubic root of 5163781391 is about 1728.4465312242.

The spelling of 5163781391 in words is "five billion, one hundred sixty-three million, seven hundred eighty-one thousand, three hundred ninety-one".