43939072540 has 24 divisors (see below), whose sum is σ = 100660421232. Its totient is φ = 15977844480.

The previous prime is 43939072531. The next prime is 43939072543. The reversal of 43939072540 is 4527093934.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43939072543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99861309 + ... + 99861748.

It is an arithmetic number, because the mean of its divisors is an integer number (4194184218).

Almost surely, 2^43939072540 is an apocalyptic number.

It is an amenable number.

43939072540 is an abundant number, since it is smaller than the sum of its proper divisors (56721348692).

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

43939072540 is a wasteful number, since it uses less digits than its factorization.

43939072540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199723077 (or 199723075 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 43939072540 in words is "forty-three billion, nine hundred thirty-nine million, seventy-two thousand, five hundred forty".