64775523 has 16 divisors (see below), whose sum is σ = 89603072. Its totient is φ = 41580000.

The previous prime is 64775507. The next prime is 64775551. The reversal of 64775523 is 32557746.

It is not a de Polignac number, because 64775523 - 2⁴ = 64775507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64705523) 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, 17973 + ... + 21273.

It is an arithmetic number, because the mean of its divisors is an integer number (5600192).

Almost surely, 2^64775523 is an apocalyptic number.

64775523 is a deficient number, since it is larger than the sum of its proper divisors (24827549).

64775523 is a wasteful number, since it uses less digits than its factorization.

64775523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3546.

The product of its digits is 176400, while the sum is 39.

The square root of 64775523 is about 8048.3242355164. The cubic root of 64775523 is about 401.6091905003.

The spelling of 64775523 in words is "sixty-four million, seven hundred seventy-five thousand, five hundred twenty-three".