68681560 has 32 divisors (see below), whose sum is σ = 158306400. Its totient is φ = 26801920.

The previous prime is 68681549. The next prime is 68681563. The reversal of 68681560 is 6518686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68681563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19300 + ... + 22579.

It is an arithmetic number, because the mean of its divisors is an integer number (4947075).

Almost surely, 2^68681560 is an apocalyptic number.

It is an amenable number.

68681560 is an abundant number, since it is smaller than the sum of its proper divisors (89624840).

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

68681560 is a wasteful number, since it uses less digits than its factorization.

68681560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41931 (or 41927 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68681560 is about 8287.4338609729. The cubic root of 68681560 is about 409.5246523543.

The spelling of 68681560 in words is "sixty-eight million, six hundred eighty-one thousand, five hundred sixty".