43345721613 has 8 divisors (see below), whose sum is σ = 57795796000. Its totient is φ = 28896397488.

The previous prime is 43345721599. The next prime is 43345721633. The reversal of 43345721613 is 31612754334.

43345721613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43345721613 - 2⁵ = 43345721581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43345721633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35038 + ... + 296511.

It is an arithmetic number, because the mean of its divisors is an integer number (7224474500).

Almost surely, 2^43345721613 is an apocalyptic number.

It is an amenable number.

43345721613 is a deficient number, since it is larger than the sum of its proper divisors (14450074387).

43345721613 is a wasteful number, since it uses less digits than its factorization.

43345721613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375131.

The product of its digits is 181440, while the sum is 39.

The spelling of 43345721613 in words is "forty-three billion, three hundred forty-five million, seven hundred twenty-one thousand, six hundred thirteen".