68263690687920 has 1920 divisors, whose sum is σ = 310482527846400. Its totient is φ = 13036955443200.

The previous prime is 68263690687891. The next prime is 68263690687981. The reversal of 68263690687920 is 2978609636286.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3048699925 + ... + 3048722315.

It is an arithmetic number, because the mean of its divisors is an integer number (161709649920).

Almost surely, 2^{68263690687920} is an apocalyptic number.

68263690687920 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 68263690687920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155241263923200).

68263690687920 is an abundant number, since it is smaller than the sum of its proper divisors (242218837158480).

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

68263690687920 is a wasteful number, since it uses less digits than its factorization.

68263690687920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22559 (or 22550 counting only the distinct ones).

The product of its (nonzero) digits is 564350976, while the sum is 72.

The spelling of 68263690687920 in words is "sixty-eight trillion, two hundred sixty-three billion, six hundred ninety million, six hundred eighty-seven thousand, nine hundred twenty".