64620624220 has 12 divisors (see below), whose sum is σ = 135703310904. Its totient is φ = 25848249680.

The previous prime is 64620624217. The next prime is 64620624221. The reversal of 64620624220 is 2242602646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620624221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1615515586 + ... + 1615515625.

It is an arithmetic number, because the mean of its divisors is an integer number (11308609242).

Almost surely, 2^64620624220 is an apocalyptic number.

It is an amenable number.

64620624220 is an abundant number, since it is smaller than the sum of its proper divisors (71082686684).

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

64620624220 is a wasteful number, since it uses less digits than its factorization.

64620624220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3231031220 (or 3231031218 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 64620624220 in words is "sixty-four billion, six hundred twenty million, six hundred twenty-four thousand, two hundred twenty".