64372513 has 8 divisors (see below), whose sum is σ = 68085920. Its totient is φ = 60691680.

The previous prime is 64372493. The next prime is 64372537. The reversal of 64372513 is 31527346.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64372513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64372573) 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, 4020 + ... + 12037.

It is an arithmetic number, because the mean of its divisors is an integer number (8510740).

Almost surely, 2^64372513 is an apocalyptic number.

It is an amenable number.

64372513 is a deficient number, since it is larger than the sum of its proper divisors (3713407).

64372513 is a wasteful number, since it uses less digits than its factorization.

64372513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16287.

The product of its digits is 15120, while the sum is 31.

The square root of 64372513 is about 8023.2482823355. The cubic root of 64372513 is about 400.7745678933.

Adding to 64372513 its reverse (31527346), we get a palindrome (95899859).

The spelling of 64372513 in words is "sixty-four million, three hundred seventy-two thousand, five hundred thirteen".