68540560 has 80 divisors (see below), whose sum is σ = 176452992. Its totient is φ = 24550400.

The previous prime is 68540557. The next prime is 68540567. The reversal of 68540560 is 6504586.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×68540560² = 9395616730227200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (68540567) 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, 61932 + ... + 63028.

Almost surely, 2^68540560 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 68540560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88226496).

68540560 is an abundant number, since it is smaller than the sum of its proper divisors (107912432).

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

68540560 is a wasteful number, since it uses less digits than its factorization.

68540560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 68540560 is about 8278.9226352225. The cubic root of 68540560 is about 409.2442154333.

The spelling of 68540560 in words is "sixty-eight million, five hundred forty thousand, five hundred sixty".