43649798399 has 4 divisors (see below), whose sum is σ = 43651091760. Its totient is φ = 43648505040.

The previous prime is 43649798393. The next prime is 43649798411. The reversal of 43649798399 is 99389794634.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43649798399 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 (43649798393) 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, 594662 + ... + 664019.

It is an arithmetic number, because the mean of its divisors is an integer number (10912772940).

Almost surely, 2^43649798399 is an apocalyptic number.

43649798399 is a deficient number, since it is larger than the sum of its proper divisors (1293361).

43649798399 is a wasteful number, since it uses less digits than its factorization.

43649798399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293360.

The product of its digits is 317447424, while the sum is 71.

The spelling of 43649798399 in words is "forty-three billion, six hundred forty-nine million, seven hundred ninety-eight thousand, three hundred ninety-nine".