43138458791 has 4 divisors (see below), whose sum is σ = 43140668592. Its totient is φ = 43136248992.

The previous prime is 43138458733. The next prime is 43138458799. The reversal of 43138458791 is 19785483134.

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

It is a cyclic number.

It is not a de Polignac number, because 43138458791 - 2³⁴ = 25958589607 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 (43138458799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075355 + ... + 1114748.

It is an arithmetic number, because the mean of its divisors is an integer number (10785167148).

Almost surely, 2^43138458791 is an apocalyptic number.

43138458791 is a deficient number, since it is larger than the sum of its proper divisors (2209801).

43138458791 is a wasteful number, since it uses less digits than its factorization.

43138458791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2209800.

The product of its digits is 2903040, while the sum is 53.

The spelling of 43138458791 in words is "forty-three billion, one hundred thirty-eight million, four hundred fifty-eight thousand, seven hundred ninety-one".