77213281543 has 2 divisors, whose sum is σ = 77213281544. Its totient is φ = 77213281542.

The previous prime is 77213281513. The next prime is 77213281559. The reversal of 77213281543 is 34518231277.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77213281543 - 2⁵ = 77213281511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77213281543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77213281513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38606640771 + 38606640772.

It is an arithmetic number, because the mean of its divisors is an integer number (38606640772).

Almost surely, 2^77213281543 is an apocalyptic number.

77213281543 is a deficient number, since it is larger than the sum of its proper divisors (1).

77213281543 is an equidigital number, since it uses as much as digits as its factorization.

77213281543 is an evil number, because the sum of its binary digits is even.

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

The spelling of 77213281543 in words is "seventy-seven billion, two hundred thirteen million, two hundred eighty-one thousand, five hundred forty-three".