64523032547 has 4 divisors (see below), whose sum is σ = 64636033176. Its totient is φ = 64410031920.

The previous prime is 64523032531. The next prime is 64523032559. The reversal of 64523032547 is 74523032546.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 64523032547 - 2⁴ = 64523032531 is a prime.

It is a super-2 number, since 2×64523032547² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64523032447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56499458 + ... + 56500599.

It is an arithmetic number, because the mean of its divisors is an integer number (16159008294).

Almost surely, 2^64523032547 is an apocalyptic number.

64523032547 is a deficient number, since it is larger than the sum of its proper divisors (113000629).

64523032547 is a wasteful number, since it uses less digits than its factorization.

64523032547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113000628.

The product of its (nonzero) digits is 604800, while the sum is 41.

Subtracting 64523032547 from its reverse (74523032546), we obtain a palindrome (9999999999).

The spelling of 64523032547 in words is "sixty-four billion, five hundred twenty-three million, thirty-two thousand, five hundred forty-seven".