68644232280 has 192 divisors, whose sum is σ = 240396024960. Its totient is φ = 16887112704.

The previous prime is 68644232243. The next prime is 68644232333. The reversal of 68644232280 is 8223244686.

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 polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10915297 + ... + 10921583.

It is an arithmetic number, because the mean of its divisors is an integer number (1252062630).

Almost surely, 2^68644232280 is an apocalyptic number.

68644232280 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 68644232280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120198012480).

68644232280 is an abundant number, since it is smaller than the sum of its proper divisors (171751792680).

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

68644232280 is a wasteful number, since it uses less digits than its factorization.

68644232280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8650 (or 8643 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The spelling of 68644232280 in words is "sixty-eight billion, six hundred forty-four million, two hundred thirty-two thousand, two hundred eighty".