64543501 has 4 divisors (see below), whose sum is σ = 70411104. Its totient is φ = 58675900.

The previous prime is 64543499. The next prime is 64543511. The reversal of 64543501 is 10534546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64543501 - 2¹ = 64543499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64543501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64543511) 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, 2933785 + ... + 2933806.

It is an arithmetic number, because the mean of its divisors is an integer number (17602776).

Almost surely, 2^64543501 is an apocalyptic number.

It is an amenable number.

64543501 is a deficient number, since it is larger than the sum of its proper divisors (5867603).

64543501 is a wasteful number, since it uses less digits than its factorization.

64543501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5867602.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 64543501 is about 8033.8969995887. The cubic root of 64543501 is about 401.1291035640.

The spelling of 64543501 in words is "sixty-four million, five hundred forty-three thousand, five hundred one".