68400563 has 8 divisors (see below), whose sum is σ = 85278720. Its totient is φ = 53299080.

The previous prime is 68400523. The next prime is 68400569. The reversal of 68400563 is 36500486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68400563 - 2¹² = 68396467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68400569) 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, 444083 + ... + 444236.

It is an arithmetic number, because the mean of its divisors is an integer number (10659840).

Almost surely, 2^68400563 is an apocalyptic number.

68400563 is a deficient number, since it is larger than the sum of its proper divisors (16878157).

68400563 is a wasteful number, since it uses less digits than its factorization.

68400563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888337.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 68400563 is about 8270.4632881115. The cubic root of 68400563 is about 408.9653926238.

The spelling of 68400563 in words is "sixty-eight million, four hundred thousand, five hundred sixty-three".