68564780 has 12 divisors (see below), whose sum is σ = 143986080. Its totient is φ = 27425904.

The previous prime is 68564779. The next prime is 68564789. The reversal of 68564780 is 8746586.

It is a super-2 number, since 2×68564780² = 9402258112896800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68564789) 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, 1714100 + ... + 1714139.

It is an arithmetic number, because the mean of its divisors is an integer number (11998840).

Almost surely, 2^68564780 is an apocalyptic number.

It is an amenable number.

68564780 is an abundant number, since it is smaller than the sum of its proper divisors (75421300).

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

68564780 is a wasteful number, since it uses less digits than its factorization.

68564780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428248 (or 3428246 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 68564780 is about 8280.3852567378. The cubic root of 68564780 is about 409.2924142790.

The spelling of 68564780 in words is "sixty-eight million, five hundred sixty-four thousand, seven hundred eighty".