77138132447 has 2 divisors, whose sum is σ = 77138132448. Its totient is φ = 77138132446.

The previous prime is 77138132339. The next prime is 77138132473. The reversal of 77138132447 is 74423183177.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77138132447 - 2¹⁶ = 77138066911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77137132447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38569066223 + 38569066224.

It is an arithmetic number, because the mean of its divisors is an integer number (38569066224).

Almost surely, 2^77138132447 is an apocalyptic number.

77138132447 is a deficient number, since it is larger than the sum of its proper divisors (1).

77138132447 is an equidigital number, since it uses as much as digits as its factorization.

77138132447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 47.

The spelling of 77138132447 in words is "seventy-seven billion, one hundred thirty-eight million, one hundred thirty-two thousand, four hundred forty-seven".