68520564 has 72 divisors (see below), whose sum is σ = 199600128. Its totient is φ = 19414080.

The previous prime is 68520563. The next prime is 68520577. The reversal of 68520564 is 46502586.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68520563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30934 + ... + 33074.

It is an arithmetic number, because the mean of its divisors is an integer number (2772224).

Almost surely, 2^68520564 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 68520564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99800064).

68520564 is an abundant number, since it is smaller than the sum of its proper divisors (131079564).

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

68520564 is a wasteful number, since it uses less digits than its factorization.

68520564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285 (or 2280 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 68520564 is about 8277.7149020729. The cubic root of 68520564 is about 409.2044139724.

The spelling of 68520564 in words is "sixty-eight million, five hundred twenty thousand, five hundred sixty-four".