68812856744 has 8 divisors (see below), whose sum is σ = 129024106410. Its totient is φ = 34406428368.

The previous prime is 68812856731. The next prime is 68812856753. The reversal of 68812856744 is 44765821886.

It can be written as a sum of positive squares in only one way, i.e., 34945815844 + 33867040900 = 186938^2 + 184030^2 .

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, 4300803539 + ... + 4300803554.

Almost surely, 2^68812856744 is an apocalyptic number.

It is an amenable number.

68812856744 is a deficient number, since it is larger than the sum of its proper divisors (60211249666).

68812856744 is a wasteful number, since it uses less digits than its factorization.

68812856744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8601607099 (or 8601607095 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 59.

The spelling of 68812856744 in words is "sixty-eight billion, eight hundred twelve million, eight hundred fifty-six thousand, seven hundred forty-four".