78688313744 has 10 divisors (see below), whose sum is σ = 152458607910. Its totient is φ = 39344156864.

The previous prime is 78688313719. The next prime is 78688313749. The reversal of 78688313744 is 44731388687.

It can be written as a sum of positive squares in only one way, i.e., 73984000000 + 4704313744 = 272000^2 + 68588^2 .

It is not an unprimeable number, because it can be changed into a prime (78688313749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2459009789 + ... + 2459009820.

It is an arithmetic number, because the mean of its divisors is an integer number (15245860791).

Almost surely, 2^78688313744 is an apocalyptic number.

It is an amenable number.

78688313744 is a deficient number, since it is larger than the sum of its proper divisors (73770294166).

78688313744 is a wasteful number, since it uses less digits than its factorization.

78688313744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4918019617 (or 4918019611 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 59.

The spelling of 78688313744 in words is "seventy-eight billion, six hundred eighty-eight million, three hundred thirteen thousand, seven hundred forty-four".