68553563 has 16 divisors (see below), whose sum is σ = 76224960. Its totient is φ = 61243776.

The previous prime is 68553557. The next prime is 68553581. The reversal of 68553563 is 36535586.

It is a cyclic number.

It is not a de Polignac number, because 68553563 - 2²² = 64359259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68553563.

It is not an unprimeable number, because it can be changed into a prime (68453563) 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, 172481 + ... + 172877.

It is an arithmetic number, because the mean of its divisors is an integer number (4764060).

Almost surely, 2^68553563 is an apocalyptic number.

68553563 is a deficient number, since it is larger than the sum of its proper divisors (7671397).

68553563 is a wasteful number, since it uses less digits than its factorization.

68553563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806.

The product of its digits is 324000, while the sum is 41.

The square root of 68553563 is about 8279.7079054759. The cubic root of 68553563 is about 409.2700933760.

The spelling of 68553563 in words is "sixty-eight million, five hundred fifty-three thousand, five hundred sixty-three".