7811671963 has 2 divisors, whose sum is σ = 7811671964. Its totient is φ = 7811671962.

The previous prime is 7811671943. The next prime is 7811671969. The reversal of 7811671963 is 3691761187.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7811671963 is a prime.

It is a super-2 number, since 2×7811671963² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7811671969) 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, 3905835981 + 3905835982.

It is an arithmetic number, because the mean of its divisors is an integer number (3905835982).

Almost surely, 2^7811671963 is an apocalyptic number.

7811671963 is a deficient number, since it is larger than the sum of its proper divisors (1).

7811671963 is an equidigital number, since it uses as much as digits as its factorization.

7811671963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 7811671963 is about 88383.6634395746. The cubic root of 7811671963 is about 1984.1812097205.

The spelling of 7811671963 in words is "seven billion, eight hundred eleven million, six hundred seventy-one thousand, nine hundred sixty-three".