43538618944 has 28 divisors (see below), whose sum is σ = 91479122604. Its totient is φ = 20488761344.

The previous prime is 43538618899. The next prime is 43538618951. The reversal of 43538618944 is 44981683534.

It can be written as a sum of positive squares in 2 ways, for example, as 24186470400 + 19352148544 = 155520^2 + 139112^2 .

It is a super-2 number, since 2×43538618944² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20007469 + ... + 20009644.

Almost surely, 2^43538618944 is an apocalyptic number.

It is an amenable number.

43538618944 is an abundant number, since it is smaller than the sum of its proper divisors (47940503660).

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

43538618944 is a wasteful number, since it uses less digits than its factorization.

43538618944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40017142 (or 40017132 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 55.

The spelling of 43538618944 in words is "forty-three billion, five hundred thirty-eight million, six hundred eighteen thousand, nine hundred forty-four".