64609537 has 8 divisors (see below), whose sum is σ = 69866496. Its totient is φ = 59514432.

The previous prime is 64609483. The next prime is 64609541. The reversal of 64609537 is 73590646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64609537 - 2⁷ = 64609409 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 64609537.

It is not an unprimeable number, because it can be changed into a prime (64609547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39633 + ... + 41230.

It is an arithmetic number, because the mean of its divisors is an integer number (8733312).

Almost surely, 2^64609537 is an apocalyptic number.

It is an amenable number.

64609537 is a deficient number, since it is larger than the sum of its proper divisors (5256959).

64609537 is a wasteful number, since it uses less digits than its factorization.

64609537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80927.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 64609537 is about 8038.0057850191. The cubic root of 64609537 is about 401.2658585296.

The spelling of 64609537 in words is "sixty-four million, six hundred nine thousand, five hundred thirty-seven".