8151964643 has 2 divisors, whose sum is σ = 8151964644. Its totient is φ = 8151964642.

The previous prime is 8151964637. The next prime is 8151964741. The reversal of 8151964643 is 3464691518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8151964643 - 2²² = 8147770339 is a prime.

It is not a weakly prime, because it can be changed into another prime (8151964343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4075982321 + 4075982322.

It is an arithmetic number, because the mean of its divisors is an integer number (4075982322).

Almost surely, 2^8151964643 is an apocalyptic number.

8151964643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8151964643 is an equidigital number, since it uses as much as digits as its factorization.

8151964643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 47.

The square root of 8151964643 is about 90288.2309218649. The cubic root of 8151964643 is about 2012.5843709751.

The spelling of 8151964643 in words is "eight billion, one hundred fifty-one million, nine hundred sixty-four thousand, six hundred forty-three".