778136068 has 6 divisors (see below), whose sum is σ = 1361738126. Its totient is φ = 389068032.

The previous prime is 778136059. The next prime is 778136077. The reversal of 778136068 is 860631877.

It is an interprime number because it is at equal distance from previous prime (778136059) and next prime (778136077).

It can be written as a sum of positive squares in only one way, i.e., 661106944 + 117029124 = 25712^2 + 10818^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97267005 + ... + 97267012.

Almost surely, 2^778136068 is an apocalyptic number.

It is an amenable number.

778136068 is a deficient number, since it is larger than the sum of its proper divisors (583602058).

778136068 is a wasteful number, since it uses less digits than its factorization.

778136068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194534021 (or 194534019 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 778136068 is about 27895.0903923970. The cubic root of 778136068 is about 919.7825840997.

The spelling of 778136068 in words is "seven hundred seventy-eight million, one hundred thirty-six thousand, sixty-eight".