64537535 has 4 divisors (see below), whose sum is σ = 77445048. Its totient is φ = 51630024.

The previous prime is 64537523. The next prime is 64537591. The reversal of 64537535 is 53573546.

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 64537535 - 2⁸ = 64537279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6453749 + ... + 6453758.

It is an arithmetic number, because the mean of its divisors is an integer number (19361262).

Almost surely, 2^64537535 is an apocalyptic number.

64537535 is a deficient number, since it is larger than the sum of its proper divisors (12907513).

64537535 is a wasteful number, since it uses less digits than its factorization.

64537535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12907512.

The product of its digits is 189000, while the sum is 38.

The square root of 64537535 is about 8033.5256892600. The cubic root of 64537535 is about 401.1167438896.

The spelling of 64537535 in words is "sixty-four million, five hundred thirty-seven thousand, five hundred thirty-five".