64606272020 has 48 divisors (see below), whose sum is σ = 139673237760. Its totient is φ = 25083932544.

The previous prime is 64606271987. The next prime is 64606272023. The reversal of 64606272020 is 2027260646.

64606272020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64606272023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205877 + ... + 414243.

It is an arithmetic number, because the mean of its divisors is an integer number (2909859120).

Almost surely, 2^64606272020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64606272020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69836618880).

64606272020 is an abundant number, since it is smaller than the sum of its proper divisors (75066965740).

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

64606272020 is a wasteful number, since it uses less digits than its factorization.

64606272020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208832 (or 208830 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 64606272020 in words is "sixty-four billion, six hundred six million, two hundred seventy-two thousand, twenty".