8077251643 has 2 divisors, whose sum is σ = 8077251644. Its totient is φ = 8077251642.

The previous prime is 8077251641. The next prime is 8077251649. The reversal of 8077251643 is 3461527708.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8077251643 - 2¹ = 8077251641 is a prime.

Together with 8077251641, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 8077251643.

It is not a weakly prime, because it can be changed into another prime (8077251641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4038625821 + 4038625822.

It is an arithmetic number, because the mean of its divisors is an integer number (4038625822).

Almost surely, 2^8077251643 is an apocalyptic number.

8077251643 is a deficient number, since it is larger than the sum of its proper divisors (1).

8077251643 is an equidigital number, since it uses as much as digits as its factorization.

8077251643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 8077251643 is about 89873.5313816031. The cubic root of 8077251643 is about 2006.4170257866.

The spelling of 8077251643 in words is "eight billion, seventy-seven million, two hundred fifty-one thousand, six hundred forty-three".