78057877312 has 14 divisors (see below), whose sum is σ = 154896100418. Its totient is φ = 39028938624.

The previous prime is 78057877277. The next prime is 78057877321. The reversal of 78057877312 is 21377875087.

It can be written as a sum of positive squares in only one way, i.e., 67338174016 + 10719703296 = 259496^2 + 103536^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609827103 + ... + 609827230.

Almost surely, 2^78057877312 is an apocalyptic number.

It is an amenable number.

78057877312 is a deficient number, since it is larger than the sum of its proper divisors (76838223106).

78057877312 is a wasteful number, since it uses less digits than its factorization.

78057877312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219654345 (or 1219654335 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 55.

The spelling of 78057877312 in words is "seventy-eight billion, fifty-seven million, eight hundred seventy-seven thousand, three hundred twelve".