64137539 has 8 divisors (see below), whose sum is σ = 66082608. Its totient is φ = 62203680.

The previous prime is 64137533. The next prime is 64137551. The reversal of 64137539 is 93573146.

It is a happy number.

64137539 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 not a de Polignac number, because 64137539 - 2¹⁶ = 64072003 is a prime.

It is a super-2 number, since 2×64137539² = 8227247817953042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64137533) 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, 9629 + ... + 14865.

It is an arithmetic number, because the mean of its divisors is an integer number (8260326).

Almost surely, 2^64137539 is an apocalyptic number.

64137539 is a deficient number, since it is larger than the sum of its proper divisors (1945069).

64137539 is a wasteful number, since it uses less digits than its factorization.

64137539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5605.

The product of its digits is 68040, while the sum is 38.

The square root of 64137539 is about 8008.5915740535. The cubic root of 64137539 is about 400.2863345657.

The spelling of 64137539 in words is "sixty-four million, one hundred thirty-seven thousand, five hundred thirty-nine".