64190506 has 8 divisors (see below), whose sum is σ = 97604964. Its totient is φ = 31655520.

The previous prime is 64190479. The next prime is 64190509. The reversal of 64190506 is 60509146.

It can be written as a sum of positive squares in 2 ways, for example, as 60918025 + 3272481 = 7805^2 + 1809^2 .

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

It is not an unprimeable number, because it can be changed into a prime (64190509) 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, 219685 + ... + 219976.

Almost surely, 2^64190506 is an apocalyptic number.

64190506 is a deficient number, since it is larger than the sum of its proper divisors (33414458).

64190506 is a wasteful number, since it uses less digits than its factorization.

64190506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439736.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 64190506 is about 8011.8977776804. The cubic root of 64190506 is about 400.3964943507.

The spelling of 64190506 in words is "sixty-four million, one hundred ninety thousand, five hundred six".