68721508350 has 576 divisors, whose sum is σ = 220765870080. Its totient is φ = 15681600000.

The previous prime is 68721508267. The next prime is 68721508351. The reversal of 68721508350 is 5380512786.

68721508350 is a `hidden beast` number, since 6 + 87 + 215 + 0 + 8 + 350 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 68721508296 and 68721508305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68721508351) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 207617685 + ... + 207618015.

It is an arithmetic number, because the mean of its divisors is an integer number (383274080).

Almost surely, 2^68721508350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68721508350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110382935040).

68721508350 is an abundant number, since it is smaller than the sum of its proper divisors (152044361730).

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

68721508350 is a wasteful number, since it uses less digits than its factorization.

68721508350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 68721508350 in words is "sixty-eight billion, seven hundred twenty-one million, five hundred eight thousand, three hundred fifty".