64138513 has 8 divisors (see below), whose sum is σ = 67009536. Its totient is φ = 61274400.

The previous prime is 64138483. The next prime is 64138523. The reversal of 64138513 is 31583146.

64138513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-64138513 is a prime.

It is a super-2 number, since 2×64138513² = 8227497699702338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64138523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29328 + ... + 31438.

It is an arithmetic number, because the mean of its divisors is an integer number (8376192).

Almost surely, 2^64138513 is an apocalyptic number.

It is an amenable number.

64138513 is a deficient number, since it is larger than the sum of its proper divisors (2871023).

64138513 is a wasteful number, since it uses less digits than its factorization.

64138513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455.

The product of its digits is 8640, while the sum is 31.

The square root of 64138513 is about 8008.6523835162. The cubic root of 64138513 is about 400.2883608201.

The spelling of 64138513 in words is "sixty-four million, one hundred thirty-eight thousand, five hundred thirteen".