64128063 has 16 divisors (see below), whose sum is σ = 91121760. Its totient is φ = 39975936.

The previous prime is 64128049. The next prime is 64128073. The reversal of 64128063 is 36082146.

It is a Cunningham number, because it is equal to 8008²-1.

It is not a de Polignac number, because 64128063 - 2⁴ = 64128047 is a prime.

It is a super-2 number, since 2×64128063² = 8224816928263938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64128063.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64128073) 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, 4003 + ... + 12011.

It is an arithmetic number, because the mean of its divisors is an integer number (5695110).

Almost surely, 2^64128063 is an apocalyptic number.

64128063 is a deficient number, since it is larger than the sum of its proper divisors (26993697).

64128063 is a wasteful number, since it uses less digits than its factorization.

64128063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8186.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 64128063 is about 8007.9999375624. Note that the first 4 decimals coincide. The cubic root of 64128063 is about 400.2666201614.

The spelling of 64128063 in words is "sixty-four million, one hundred twenty-eight thousand, sixty-three".