77768403712 has 36 divisors (see below), whose sum is σ = 161982298800. Its totient is φ = 37193581568.

The previous prime is 77768403649. The next prime is 77768403733. The reversal of 77768403712 is 21730486777.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77768403712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6598087 + ... + 6609862.

It is an arithmetic number, because the mean of its divisors is an integer number (4499508300).

Almost surely, 2^77768403712 is an apocalyptic number.

It is an amenable number.

77768403712 is an abundant number, since it is smaller than the sum of its proper divisors (84213895088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77768403712 is a wasteful number, since it uses less digits than its factorization.

77768403712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13207988 (or 13207974 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 52.

The spelling of 77768403712 in words is "seventy-seven billion, seven hundred sixty-eight million, four hundred three thousand, seven hundred twelve".