68521712 has 20 divisors (see below), whose sum is σ = 151726896. Its totient is φ = 29366400.

The previous prime is 68521709. The next prime is 68521721. The reversal of 68521712 is 21712586.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305789 + ... + 306012.

Almost surely, 2^68521712 is an apocalyptic number.

It is an amenable number.

68521712 is an abundant number, since it is smaller than the sum of its proper divisors (83205184).

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

68521712 is a wasteful number, since it uses less digits than its factorization.

68521712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611816 (or 611810 counting only the distinct ones).

The product of its digits is 6720, while the sum is 32.

The square root of 68521712 is about 8277.7842445911. The cubic root of 68521712 is about 409.2066992428.

The spelling of 68521712 in words is "sixty-eight million, five hundred twenty-one thousand, seven hundred twelve".