77839585922 has 18 divisors (see below), whose sum is σ = 135826954083. Its totient is φ = 33358638852.

The previous prime is 77839585903. The next prime is 77839585931. The reversal of 77839585922 is 22958593877.

It can be written as a sum of positive squares in only one way, i.e., 38919792961 + 38919792961 = 197281^2 + 197281^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=197281.

It is a super-2 number, since 2×77839585922² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2747843 + ... + 2776025.

Almost surely, 2^77839585922 is an apocalyptic number.

77839585922 is a deficient number, since it is larger than the sum of its proper divisors (57987368161).

77839585922 is an frugal number, since it uses more digits than its factorization.

77839585922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56382 (or 28192 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 65.

The spelling of 77839585922 in words is "seventy-seven billion, eight hundred thirty-nine million, five hundred eighty-five thousand, nine hundred twenty-two".