43725340138 has 4 divisors (see below), whose sum is σ = 65588010210. Its totient is φ = 21862670068.

The previous prime is 43725340117. The next prime is 43725340147. The reversal of 43725340138 is 83104352734.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24255882049 + 19469458089 = 155743^2 + 139533^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 43725340138.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10931335033 + ... + 10931335036.

Almost surely, 2^43725340138 is an apocalyptic number.

43725340138 is a deficient number, since it is larger than the sum of its proper divisors (21862670072).

43725340138 is a wasteful number, since it uses less digits than its factorization.

43725340138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21862670071.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 43725340138 in words is "forty-three billion, seven hundred twenty-five million, three hundred forty thousand, one hundred thirty-eight".