43949558618947 has 32 divisors (see below), whose sum is σ = 45895322753280. Its totient is φ = 42034451773440.

The previous prime is 43949558618941. The next prime is 43949558619041. The reversal of 43949558618947 is 74981685594934.

It is a cyclic number.

It is not a de Polignac number, because 43949558618947 - 2²⁷ = 43949424401219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43949558618941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2676415797 + ... + 2676432217.

It is an arithmetic number, because the mean of its divisors is an integer number (1434228836040).

Almost surely, 2^{43949558618947} is an apocalyptic number.

43949558618947 is a deficient number, since it is larger than the sum of its proper divisors (1945764134333).

43949558618947 is a wasteful number, since it uses less digits than its factorization.

43949558618947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18543.

The product of its digits is 9405849600, while the sum is 82.

The spelling of 43949558618947 in words is "forty-three trillion, nine hundred forty-nine billion, five hundred fifty-eight million, six hundred eighteen thousand, nine hundred forty-seven".