772868555 has 4 divisors (see below), whose sum is σ = 927442272. Its totient is φ = 618294840.

The previous prime is 772868539. The next prime is 772868581. The reversal of 772868555 is 555868277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555868277 = 2089 ⋅266093.

It is not a de Polignac number, because 772868555 - 2⁴ = 772868539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 772868497 and 772868506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77286851 + ... + 77286860.

It is an arithmetic number, because the mean of its divisors is an integer number (231860568).

Almost surely, 2^772868555 is an apocalyptic number.

772868555 is a deficient number, since it is larger than the sum of its proper divisors (154573717).

772868555 is a wasteful number, since it uses less digits than its factorization.

772868555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154573716.

The product of its digits is 4704000, while the sum is 53.

The square root of 772868555 is about 27800.5135743928. The cubic root of 772868555 is about 917.7024249763.

The spelling of 772868555 in words is "seven hundred seventy-two million, eight hundred sixty-eight thousand, five hundred fifty-five".