68216145355572 has 48 divisors (see below), whose sum is σ = 160653810240000. Its totient is φ = 22527465482080.

The previous prime is 68216145355499. The next prime is 68216145355609. The reversal of 68216145355572 is 27555354161286.

It is a happy number.

68216145355572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×68216145355572² (a number of 28 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 35280822 + ... + 37164077.

It is an arithmetic number, because the mean of its divisors is an integer number (3346954380000).

Almost surely, 2^{68216145355572} is an apocalyptic number.

It is an amenable number.

68216145355572 is an abundant number, since it is smaller than the sum of its proper divisors (92437664884428).

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

68216145355572 is a wasteful number, since it uses less digits than its factorization.

68216145355572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72445636 (or 72445634 counting only the distinct ones).

The product of its digits is 60480000, while the sum is 60.

The spelling of 68216145355572 in words is "sixty-eight trillion, two hundred sixteen billion, one hundred forty-five million, three hundred fifty-five thousand, five hundred seventy-two".