68937663488 has 66 divisors (see below), whose sum is σ = 139012208058. Its totient is φ = 34168422400.

The previous prime is 68937663479. The next prime is 68937663493. The reversal of 68937663488 is 88436673986.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 38365840384 + 30571823104 = 195872^2 + 174848^2 .

It is a super-2 number, since 2×68937663488² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 98341538 + ... + 98342238.

Almost surely, 2^68937663488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68937663488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69506104029).

68937663488 is an abundant number, since it is smaller than the sum of its proper divisors (70074544570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68937663488 is an frugal number, since it uses more digits than its factorization.

68937663488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 840 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 68.

The spelling of 68937663488 in words is "sixty-eight billion, nine hundred thirty-seven million, six hundred sixty-three thousand, four hundred eighty-eight".