68511072 has 96 divisors (see below), whose sum is σ = 206841600. Its totient is φ = 19450368.

The previous prime is 68511061. The next prime is 68511073. The reversal of 68511072 is 27011586.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68511073) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180579 + ... + 180957.

It is an arithmetic number, because the mean of its divisors is an integer number (2154600).

Almost surely, 2^68511072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68511072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103420800).

68511072 is an abundant number, since it is smaller than the sum of its proper divisors (138330528).

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

68511072 is a wasteful number, since it uses less digits than its factorization.

68511072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 68511072 is about 8277.1415355786. The cubic root of 68511072 is about 409.1855177101.

The spelling of 68511072 in words is "sixty-eight million, five hundred eleven thousand, seventy-two".