64611020 has 24 divisors (see below), whose sum is σ = 142825200. Its totient is φ = 24484032.

The previous prime is 64611011. The next prime is 64611023. The reversal of 64611020 is 2011646.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 64610983 and 64611001.

It is not an unprimeable number, because it can be changed into a prime (64611023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84635 + ... + 85394.

It is an arithmetic number, because the mean of its divisors is an integer number (5951050).

Almost surely, 2^64611020 is an apocalyptic number.

It is an amenable number.

64611020 is an abundant number, since it is smaller than the sum of its proper divisors (78214180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64611020 is a wasteful number, since it uses less digits than its factorization.

64611020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170057 (or 170055 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 64611020 is about 8038.0980337391. The cubic root of 64611020 is about 401.2689286270.

Adding to 64611020 its reverse (2011646), we get a palindrome (66622666).

The spelling of 64611020 in words is "sixty-four million, six hundred eleven thousand, twenty".