43161320436 has 96 divisors (see below), whose sum is σ = 116100364800. Its totient is φ = 12368142720.

The previous prime is 43161320413. The next prime is 43161320437. The reversal of 43161320436 is 63402316134.

It is a junction number, because it is equal to n+sod(n) for n = 43161320397 and 43161320406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43161320437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51471 + ... + 298281.

It is an arithmetic number, because the mean of its divisors is an integer number (1209378800).

Almost surely, 2^43161320436 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 43161320436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58050182400).

43161320436 is an abundant number, since it is smaller than the sum of its proper divisors (72939044364).

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

43161320436 is a wasteful number, since it uses less digits than its factorization.

43161320436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246909 (or 246907 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 33.

The spelling of 43161320436 in words is "forty-three billion, one hundred sixty-one million, three hundred twenty thousand, four hundred thirty-six".