64632515 has 8 divisors (see below), whose sum is σ = 78493968. Its totient is φ = 51082720.

The previous prime is 64632499. The next prime is 64632517. The reversal of 64632515 is 51523646.

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

It is not a de Polignac number, because 64632515 - 2⁴ = 64632499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64632517) 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, 77456 + ... + 78285.

It is an arithmetic number, because the mean of its divisors is an integer number (9811746).

Almost surely, 2^64632515 is an apocalyptic number.

64632515 is a deficient number, since it is larger than the sum of its proper divisors (13861453).

64632515 is a wasteful number, since it uses less digits than its factorization.

64632515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155829.

The product of its digits is 21600, while the sum is 32.

The square root of 64632515 is about 8039.4349925850. The cubic root of 64632515 is about 401.3134221685.

The spelling of 64632515 in words is "sixty-four million, six hundred thirty-two thousand, five hundred fifteen".