64541645 has 16 divisors (see below), whose sum is σ = 89303040. Its totient is φ = 43862784.

The previous prime is 64541621. The next prime is 64541663. The reversal of 64541645 is 54614546.

It is not a de Polignac number, because 64541645 - 2¹⁰ = 64540621 is a prime.

It is a super-3 number, since 3×64541645³ (a number of 24 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 4205 + ... + 12114.

It is an arithmetic number, because the mean of its divisors is an integer number (5581440).

Almost surely, 2^64541645 is an apocalyptic number.

It is an amenable number.

64541645 is a deficient number, since it is larger than the sum of its proper divisors (24761395).

64541645 is a wasteful number, since it uses less digits than its factorization.

64541645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16444.

The product of its digits is 57600, while the sum is 35.

The square root of 64541645 is about 8033.7814881910. The cubic root of 64541645 is about 401.1252585977.

The spelling of 64541645 in words is "sixty-four million, five hundred forty-one thousand, six hundred forty-five".