64403563 has 8 divisors (see below), whose sum is σ = 74142432. Its totient is φ = 54799296.

The previous prime is 64403561. The next prime is 64403567. The reversal of 64403563 is 36530446.

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 64403563 - 2¹ = 64403561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64403561) 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, 32620 + ... + 34537.

It is an arithmetic number, because the mean of its divisors is an integer number (9267804).

Almost surely, 2^64403563 is an apocalyptic number.

64403563 is a deficient number, since it is larger than the sum of its proper divisors (9738869).

64403563 is a wasteful number, since it uses less digits than its factorization.

64403563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67301.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 64403563 is about 8025.1830508718. The cubic root of 64403563 is about 400.8389952371.

The spelling of 64403563 in words is "sixty-four million, four hundred three thousand, five hundred sixty-three".