64752553 has 4 divisors (see below), whose sum is σ = 66502660. Its totient is φ = 63002448.

The previous prime is 64752491. The next prime is 64752581. The reversal of 64752553 is 35525746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35525746 = 2 ⋅17762873.

It can be written as a sum of positive squares in 2 ways, for example, as 47513449 + 17239104 = 6893^2 + 4152^2 .

It is a cyclic number.

It is not a de Polignac number, because 64752553 - 2¹⁷ = 64621481 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1750069 = 64752553 / (6 + 4 + 7 + 5 + 2 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64752593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874998 + ... + 875071.

It is an arithmetic number, because the mean of its divisors is an integer number (16625665).

Almost surely, 2^64752553 is an apocalyptic number.

It is an amenable number.

64752553 is a deficient number, since it is larger than the sum of its proper divisors (1750107).

64752553 is a wasteful number, since it uses less digits than its factorization.

64752553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750106.

The product of its digits is 126000, while the sum is 37.

The square root of 64752553 is about 8046.8971038531. The cubic root of 64752553 is about 401.5617134425.

The spelling of 64752553 in words is "sixty-four million, seven hundred fifty-two thousand, five hundred fifty-three".