64128066380 has 48 divisors (see below), whose sum is σ = 157661211456. Its totient is φ = 21450501120.

The previous prime is 64128066293. The next prime is 64128066389. The reversal of 64128066380 is 8366082146.

It is a super-2 number, since 2×64128066380² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64128066389) 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 15 ways as a sum of consecutive naturals, for example, 5580329 + ... + 5591808.

It is an arithmetic number, because the mean of its divisors is an integer number (3284608572).

Almost surely, 2^64128066380 is an apocalyptic number.

It is an amenable number.

64128066380 is an abundant number, since it is smaller than the sum of its proper divisors (93533145076).

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

64128066380 is a wasteful number, since it uses less digits than its factorization.

64128066380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11172194 (or 11172192 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 64128066380 in words is "sixty-four billion, one hundred twenty-eight million, sixty-six thousand, three hundred eighty".