64136705 has 16 divisors (see below), whose sum is σ = 78499200. Its totient is φ = 50295168.

The previous prime is 64136701. The next prime is 64136729. The reversal of 64136705 is 50763146.

It is a cyclic number.

It is not a de Polignac number, because 64136705 - 2² = 64136701 is a prime.

It is a super-2 number, since 2×64136705² = 8227033856514050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64136701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72194 + ... + 73076.

It is an arithmetic number, because the mean of its divisors is an integer number (4906200).

Almost surely, 2^64136705 is an apocalyptic number.

It is an amenable number.

64136705 is a deficient number, since it is larger than the sum of its proper divisors (14362495).

64136705 is a wasteful number, since it uses less digits than its factorization.

64136705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 64136705 is about 8008.5395048036. The cubic root of 64136705 is about 400.2845995431.

The spelling of 64136705 in words is "sixty-four million, one hundred thirty-six thousand, seven hundred five".