64271723280 has 160 divisors (see below), whose sum is σ = 206248584960. Its totient is φ = 16537221120.

The previous prime is 64271723209. The next prime is 64271723291. The reversal of 64271723280 is 8232717246.

It is a happy number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 20203290 + ... + 20206470.

It is an arithmetic number, because the mean of its divisors is an integer number (1289053656).

Almost surely, 2^64271723280 is an apocalyptic number.

64271723280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64271723280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103124292480).

64271723280 is an abundant number, since it is smaller than the sum of its proper divisors (141976861680).

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

64271723280 is a wasteful number, since it uses less digits than its factorization.

64271723280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6129 (or 6123 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The spelling of 64271723280 in words is "sixty-four billion, two hundred seventy-one million, seven hundred twenty-three thousand, two hundred eighty".