68033661518 has 32 divisors (see below), whose sum is σ = 106035138720. Its totient is φ = 32712906240.

The previous prime is 68033661517. The next prime is 68033661659. The reversal of 68033661518 is 81516633086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68033661517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17411321 + ... + 17415227.

It is an arithmetic number, because the mean of its divisors is an integer number (3313598085).

Almost surely, 2^68033661518 is an apocalyptic number.

68033661518 is a deficient number, since it is larger than the sum of its proper divisors (38001477202).

68033661518 is a wasteful number, since it uses less digits than its factorization.

68033661518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6932.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 68033661518 in words is "sixty-eight billion, thirty-three million, six hundred sixty-one thousand, five hundred eighteen".