68728017533 has 8 divisors (see below), whose sum is σ = 78771369600. Its totient is φ = 58740931440.

The previous prime is 68728017517. The next prime is 68728017557. The reversal of 68728017533 is 33571082786.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68728017533 - 2⁴ = 68728017517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68728017583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14063873 + ... + 14068758.

It is an arithmetic number, because the mean of its divisors is an integer number (9846421200).

Almost surely, 2^68728017533 is an apocalyptic number.

It is an amenable number.

68728017533 is a deficient number, since it is larger than the sum of its proper divisors (10043352067).

68728017533 is a wasteful number, since it uses less digits than its factorization.

68728017533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28132987.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 68728017533 in words is "sixty-eight billion, seven hundred twenty-eight million, seventeen thousand, five hundred thirty-three".