68544099931 has 8 divisors (see below), whose sum is σ = 68625446400. Its totient is φ = 68462793600.

The previous prime is 68544099901. The next prime is 68544099941. The reversal of 68544099931 is 13999044586.

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 68544099931 - 2¹³ = 68544091739 is a prime.

It is a super-2 number, since 2×68544099931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68544099901) 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, 4583875 + ... + 4598803.

It is an arithmetic number, because the mean of its divisors is an integer number (8578180800).

Almost surely, 2^68544099931 is an apocalyptic number.

68544099931 is a deficient number, since it is larger than the sum of its proper divisors (81346469).

68544099931 is a wasteful number, since it uses less digits than its factorization.

68544099931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20069.

The product of its (nonzero) digits is 8398080, while the sum is 58.

The spelling of 68544099931 in words is "sixty-eight billion, five hundred forty-four million, ninety-nine thousand, nine hundred thirty-one".