78818768744 has 8 divisors (see below), whose sum is σ = 147785191410. Its totient is φ = 39409384368.

The previous prime is 78818768723. The next prime is 78818768761. The reversal of 78818768744 is 44786781887.

It can be written as a sum of positive squares in only one way, i.e., 53134860100 + 25683908644 = 230510^2 + 160262^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4926173039 + ... + 4926173054.

Almost surely, 2^78818768744 is an apocalyptic number.

It is an amenable number.

78818768744 is a deficient number, since it is larger than the sum of its proper divisors (68966422666).

78818768744 is a wasteful number, since it uses less digits than its factorization.

78818768744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9852346099 (or 9852346095 counting only the distinct ones).

The product of its digits is 134873088, while the sum is 68.

The spelling of 78818768744 in words is "seventy-eight billion, eight hundred eighteen million, seven hundred sixty-eight thousand, seven hundred forty-four".