43123425549 has 4 divisors (see below), whose sum is σ = 57497900736. Its totient is φ = 28748950364.

The previous prime is 43123425481. The next prime is 43123425551. The reversal of 43123425549 is 94552432134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43123425549 - 2³⁵ = 8763687181 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 43123425549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43123425599) 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, 7187237589 + ... + 7187237594.

It is an arithmetic number, because the mean of its divisors is an integer number (14374475184).

Almost surely, 2^43123425549 is an apocalyptic number.

It is an amenable number.

43123425549 is a deficient number, since it is larger than the sum of its proper divisors (14374475187).

43123425549 is a wasteful number, since it uses less digits than its factorization.

43123425549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14374475186.

The product of its digits is 518400, while the sum is 42.

The spelling of 43123425549 in words is "forty-three billion, one hundred twenty-three million, four hundred twenty-five thousand, five hundred forty-nine".