43572166000640 has 72 divisors (see below), whose sum is σ = 104572801059300. Its totient is φ = 17428866138112.

The previous prime is 43572166000637. The next prime is 43572166000663. The reversal of 43572166000640 is 4600066127534.

It can be written as a sum of positive squares in 2 ways, for example, as 43417345785856 + 154820214784 = 6589184^2 + 393472^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43572166000591 and 43572166000600.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32587565 + ... + 33898284.

Almost surely, 2^{43572166000640} is an apocalyptic number.

43572166000640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43572166000640 is an abundant number, since it is smaller than the sum of its proper divisors (61000635058660).

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

43572166000640 is an frugal number, since it uses more digits than its factorization.

43572166000640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66485888 (or 66485856 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 44.

The spelling of 43572166000640 in words is "forty-three trillion, five hundred seventy-two billion, one hundred sixty-six million, six hundred forty", and thus it is an aban number.