43161158551680 has 960 divisors, whose sum is σ = 168628966921800. Its totient is φ = 10514549440512.

The previous prime is 43161158551663. The next prime is 43161158551723. The reversal of 43161158551680 is 8615585116134.

43161158551680 is a `hidden beast` number, since 4 + 3 + 1 + 6 + 1 + 1 + 5 + 8 + 551 + 6 + 80 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 6038264314944 + 37122894236736 = 2457288^2 + 6092856^2 .

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 849787726 + ... + 849838514.

Almost surely, 2^{43161158551680} is an apocalyptic number.

43161158551680 is a gapful number since it is divisible by the number (40) 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 43161158551680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84314483460900).

43161158551680 is an abundant number, since it is smaller than the sum of its proper divisors (125467808370120).

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

43161158551680 is a wasteful number, since it uses less digits than its factorization.

43161158551680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50943 (or 50909 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 54.

The spelling of 43161158551680 in words is "forty-three trillion, one hundred sixty-one billion, one hundred fifty-eight million, five hundred fifty-one thousand, six hundred eighty".