64836537 has 4 divisors (see below), whose sum is σ = 86448720. Its totient is φ = 43224356.

The previous prime is 64836533. The next prime is 64836557. The reversal of 64836537 is 73563846.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64836537 - 2² = 64836533 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64836533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10806087 + ... + 10806092.

It is an arithmetic number, because the mean of its divisors is an integer number (21612180).

Almost surely, 2^64836537 is an apocalyptic number.

It is an amenable number.

64836537 is a deficient number, since it is larger than the sum of its proper divisors (21612183).

64836537 is a wasteful number, since it uses less digits than its factorization.

64836537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21612182.

The product of its digits is 362880, while the sum is 42.

The square root of 64836537 is about 8052.1138218483. The cubic root of 64836537 is about 401.7352468274.

The spelling of 64836537 in words is "sixty-four million, eight hundred thirty-six thousand, five hundred thirty-seven".