64128753 has 20 divisors (see below), whose sum is σ = 103167988. Its totient is φ = 39463200.

The previous prime is 64128749. The next prime is 64128763. The reversal of 64128753 is 35782146.

64128753 is a `hidden beast` number, since 641 + 2 + 8 + 7 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2537649 + 61591104 = 1593^2 + 7848^2 .

It is not a de Polignac number, because 64128753 - 2² = 64128749 is a prime.

It is a super-2 number, since 2×64128753² = 8224993922670018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64128763) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29398 + ... + 31503.

Almost surely, 2^64128753 is an apocalyptic number.

It is an amenable number.

64128753 is a deficient number, since it is larger than the sum of its proper divisors (39039235).

64128753 is a wasteful number, since it uses less digits than its factorization.

64128753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60926 (or 60917 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 64128753 is about 8008.0430193650. The cubic root of 64128753 is about 400.2680557418.

The spelling of 64128753 in words is "sixty-four million, one hundred twenty-eight thousand, seven hundred fifty-three".