68788564 has 12 divisors (see below), whose sum is σ = 129640084. Its totient is φ = 31748544.

The previous prime is 68788543. The next prime is 68788567. The reversal of 68788564 is 46588786.

It can be written as a sum of positive squares in 2 ways, for example, as 21068100 + 47720464 = 4590^2 + 6908^2 .

It is a Harshad number since it is a multiple of its sum of digits (52), and also a Moran number because the ratio is a prime number: 1322857 = 68788564 / (6 + 8 + 7 + 8 + 8 + 5 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68788567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661377 + ... + 661480.

Almost surely, 2^68788564 is an apocalyptic number.

It is an amenable number.

68788564 is a deficient number, since it is larger than the sum of its proper divisors (60851520).

68788564 is a wasteful number, since it uses less digits than its factorization.

68788564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322874 (or 1322872 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 52.

The square root of 68788564 is about 8293.8871465676. The cubic root of 68788564 is about 409.7372180871.

The spelling of 68788564 in words is "sixty-eight million, seven hundred eighty-eight thousand, five hundred sixty-four".