38443217511 has 4 divisors (see below), whose sum is σ = 51257623352. Its totient is φ = 25628811672.

The previous prime is 38443217489. The next prime is 38443217513. The reversal of 38443217511 is 11571234483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11571234483 = 3 ⋅3857078161.

It is not a de Polignac number, because 38443217511 - 2⁶ = 38443217447 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38443217511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38443217513) 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, 6407202916 + ... + 6407202921.

It is an arithmetic number, because the mean of its divisors is an integer number (12814405838).

Almost surely, 2^38443217511 is an apocalyptic number.

38443217511 is a deficient number, since it is larger than the sum of its proper divisors (12814405841).

38443217511 is a wasteful number, since it uses less digits than its factorization.

38443217511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12814405840.

The product of its digits is 80640, while the sum is 39.

The spelling of 38443217511 in words is "thirty-eight billion, four hundred forty-three million, two hundred seventeen thousand, five hundred eleven".