43855151616 has 120 divisors (see below), whose sum is σ = 129990224364. Its totient is φ = 14223237120.

The previous prime is 43855151611. The next prime is 43855151633. The reversal of 43855151616 is 61615155834.

It is a happy number.

43855151616 is a `hidden beast` number, since 4 + 3 + 85 + 51 + 516 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39242025216 + 4613126400 = 198096^2 + 67920^2 .

It is a super-2 number, since 2×43855151616² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43855151611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41886 + ... + 299106.

Almost surely, 2^43855151616 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 43855151616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64995112182).

43855151616 is an abundant number, since it is smaller than the sum of its proper divisors (86135072748).

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

43855151616 is a wasteful number, since it uses less digits than its factorization.

43855151616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257282 (or 257263 counting only the distinct ones).

The product of its digits is 432000, while the sum is 45.

The spelling of 43855151616 in words is "forty-three billion, eight hundred fifty-five million, one hundred fifty-one thousand, six hundred sixteen".