64186745 has 16 divisors (see below), whose sum is σ = 90076800. Its totient is φ = 42989184.

The previous prime is 64186741. The next prime is 64186757. The reversal of 64186745 is 54768146.

It is not a de Polignac number, because 64186745 - 2² = 64186741 is a prime.

It is a super-3 number, since 3×64186745³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64186741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19820 + ... + 22829.

It is an arithmetic number, because the mean of its divisors is an integer number (5629800).

Almost surely, 2^64186745 is an apocalyptic number.

It is an amenable number.

64186745 is a deficient number, since it is larger than the sum of its proper divisors (25890055).

64186745 is a wasteful number, since it uses less digits than its factorization.

64186745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42704.

The product of its digits is 161280, while the sum is 41.

The square root of 64186745 is about 8011.6630608133. The cubic root of 64186745 is about 400.3886742917.

The spelling of 64186745 in words is "sixty-four million, one hundred eighty-six thousand, seven hundred forty-five".