77343617889 has 18 divisors (see below), whose sum is σ = 117907957986. Its totient is φ = 48848598720.

The previous prime is 77343617873. The next prime is 77343617893. The reversal of 77343617889 is 98871634377.

77343617889 is a `hidden beast` number, since 7 + 7 + 3 + 4 + 3 + 617 + 8 + 8 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76740080400 + 603537489 = 277020^2 + 24567^2 .

It is not a de Polignac number, because 77343617889 - 2⁴ = 77343617873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77343613889) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11899432 + ... + 11905929.

Almost surely, 2^77343617889 is an apocalyptic number.

It is an amenable number.

77343617889 is a deficient number, since it is larger than the sum of its proper divisors (40564340097).

77343617889 is a wasteful number, since it uses less digits than its factorization.

77343617889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23805405 (or 23805383 counting only the distinct ones).

The product of its digits is 42674688, while the sum is 63.

The spelling of 77343617889 in words is "seventy-seven billion, three hundred forty-three million, six hundred seventeen thousand, eight hundred eighty-nine".