64163645 has 32 divisors (see below), whose sum is σ = 97843200. Its totient is φ = 39294720.

The previous prime is 64163639. The next prime is 64163699. The reversal of 64163645 is 54636146.

It is not a de Polignac number, because 64163645 - 2⁶ = 64163581 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11831 + ... + 16379.

It is an arithmetic number, because the mean of its divisors is an integer number (3057600).

Almost surely, 2^64163645 is an apocalyptic number.

64163645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64163645 is a deficient number, since it is larger than the sum of its proper divisors (33679555).

64163645 is a wasteful number, since it uses less digits than its factorization.

64163645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605.

The product of its digits is 51840, while the sum is 35.

The square root of 64163645 is about 8010.2212828361. The cubic root of 64163645 is about 400.3406369172.

The spelling of 64163645 in words is "sixty-four million, one hundred sixty-three thousand, six hundred forty-five".