68533919744 has 28 divisors (see below), whose sum is σ = 137059489914. Its totient is φ = 34266955776.

The previous prime is 68533919723. The next prime is 68533919747. The reversal of 68533919744 is 44791933586.

It can be written as a sum of positive squares in only one way, i.e., 63423385600 + 5110534144 = 251840^2 + 71488^2 .

It is not an unprimeable number, because it can be changed into a prime (68533919747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4174787 + ... + 4191170.

Almost surely, 2^68533919744 is an apocalyptic number.

68533919744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68533919744 is a deficient number, since it is larger than the sum of its proper divisors (68525570170).

68533919744 is an frugal number, since it uses more digits than its factorization.

68533919744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8365983 (or 8365959 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 59.

The spelling of 68533919744 in words is "sixty-eight billion, five hundred thirty-three million, nine hundred nineteen thousand, seven hundred forty-four".