64051620 has 48 divisors (see below), whose sum is σ = 181628160. Its totient is φ = 16862976.

The previous prime is 64051607. The next prime is 64051627. The reversal of 64051620 is 2615046.

64051620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64051620² = 8205220049248800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64051627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2017 + ... + 11496.

It is an arithmetic number, because the mean of its divisors is an integer number (3783920).

Almost surely, 2^64051620 is an apocalyptic number.

64051620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64051620 is an abundant number, since it is smaller than the sum of its proper divisors (117576540).

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

64051620 is a wasteful number, since it uses less digits than its factorization.

64051620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13604 (or 13602 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 64051620 is about 8003.2255997192. The cubic root of 64051620 is about 400.1075127666.

Adding to 64051620 its reverse (2615046), we get a palindrome (66666666).

The spelling of 64051620 in words is "sixty-four million, fifty-one thousand, six hundred twenty".