771663775768 has 32 divisors (see below), whose sum is σ = 1450664838000. Its totient is φ = 384820070400.

The previous prime is 771663775747. The next prime is 771663775777. The reversal of 771663775768 is 867577366177.

771663775768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 771663775697 and 771663775706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48557968 + ... + 48573856.

Almost surely, 2^771663775768 is an apocalyptic number.

It is an amenable number.

771663775768 is a deficient number, since it is larger than the sum of its proper divisors (679001062232).

771663775768 is a wasteful number, since it uses less digits than its factorization.

771663775768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31435 (or 31431 counting only the distinct ones).

The product of its digits is 435637440, while the sum is 70.

The spelling of 771663775768 in words is "seven hundred seventy-one billion, six hundred sixty-three million, seven hundred seventy-five thousand, seven hundred sixty-eight".