68621128736 has 48 divisors (see below), whose sum is σ = 135803467800. Its totient is φ = 34131621888.

The previous prime is 68621128699. The next prime is 68621128739. The reversal of 68621128736 is 63782112686.

It can be written as a sum of positive squares in 4 ways, for example, as 54216328336 + 14404800400 = 232844^2 + 120020^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (68621128739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10468436 + ... + 10474988.

Almost surely, 2^68621128736 is an apocalyptic number.

It is an amenable number.

68621128736 is a deficient number, since it is larger than the sum of its proper divisors (67182339064).

68621128736 is a wasteful number, since it uses less digits than its factorization.

68621128736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8221 (or 8213 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 50.

The spelling of 68621128736 in words is "sixty-eight billion, six hundred twenty-one million, one hundred twenty-eight thousand, seven hundred thirty-six".