64526573 has 4 divisors (see below), whose sum is σ = 64545948. Its totient is φ = 64507200.

The previous prime is 64526563. The next prime is 64526597. The reversal of 64526573 is 37562546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12369289 + 52157284 = 3517^2 + 7222^2 .

It is a cyclic number.

It is not a de Polignac number, because 64526573 - 2⁸ = 64526317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64526533) 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, 3278 + ... + 11823.

It is an arithmetic number, because the mean of its divisors is an integer number (16136487).

Almost surely, 2^64526573 is an apocalyptic number.

It is an amenable number.

64526573 is a deficient number, since it is larger than the sum of its proper divisors (19375).

64526573 is a wasteful number, since it uses less digits than its factorization.

64526573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19374.

The product of its digits is 151200, while the sum is 38.

The square root of 64526573 is about 8032.8433944650. The cubic root of 64526573 is about 401.0940320898.

The spelling of 64526573 in words is "sixty-four million, five hundred twenty-six thousand, five hundred seventy-three".