77423610469 has 2 divisors, whose sum is σ = 77423610470. Its totient is φ = 77423610468.

The previous prime is 77423610449. The next prime is 77423610521. The reversal of 77423610469 is 96401632477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74276961444 + 3146649025 = 272538^2 + 56095^2 .

It is an emirp because it is prime and its reverse (96401632477) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77423610469 - 2³³ = 68833675877 is a prime.

It is a super-2 number, since 2×77423610469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77423610409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38711805234 + 38711805235.

It is an arithmetic number, because the mean of its divisors is an integer number (38711805235).

Almost surely, 2^77423610469 is an apocalyptic number.

It is an amenable number.

77423610469 is a deficient number, since it is larger than the sum of its proper divisors (1).

77423610469 is an equidigital number, since it uses as much as digits as its factorization.

77423610469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 49.

The spelling of 77423610469 in words is "seventy-seven billion, four hundred twenty-three million, six hundred ten thousand, four hundred sixty-nine".