68423733720 has 128 divisors (see below), whose sum is σ = 229532414400. Its totient is φ = 18130065408.

The previous prime is 68423733709. The next prime is 68423733731. The reversal of 68423733720 is 2733732486.

68423733720 is a `hidden beast` number, since 6 + 84 + 237 + 337 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (68423733709) and next prime (68423733731).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32209 + ... + 371328.

Almost surely, 2^68423733720 is an apocalyptic number.

68423733720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68423733720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114766207200).

68423733720 is an abundant number, since it is smaller than the sum of its proper divisors (161108680680).

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

68423733720 is a wasteful number, since it uses less digits than its factorization.

68423733720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403714 (or 403704 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 68423733720 in words is "sixty-eight billion, four hundred twenty-three million, seven hundred thirty-three thousand, seven hundred twenty".