43438925913 has 16 divisors (see below), whose sum is σ = 59921208000. Its totient is φ = 27958145600.

The previous prime is 43438925911. The next prime is 43438925923. The reversal of 43438925913 is 31952983434.

It is a cyclic number.

It is not a de Polignac number, because 43438925913 - 2¹ = 43438925911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43438925911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1613638 + ... + 1640336.

It is an arithmetic number, because the mean of its divisors is an integer number (3745075500).

Almost surely, 2^43438925913 is an apocalyptic number.

It is an amenable number.

43438925913 is a deficient number, since it is larger than the sum of its proper divisors (16482282087).

43438925913 is a wasteful number, since it uses less digits than its factorization.

43438925913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45432.

The product of its digits is 2799360, while the sum is 51.

The spelling of 43438925913 in words is "forty-three billion, four hundred thirty-eight million, nine hundred twenty-five thousand, nine hundred thirteen".