4223403806991 has 16 divisors (see below), whose sum is σ = 5781399170400. Its totient is φ = 2740811386880.

The previous prime is 4223403806939. The next prime is 4223403807013. The reversal of 4223403806991 is 1996083043224.

It is a cyclic number.

It is not a de Polignac number, because 4223403806991 - 2¹³ = 4223403798799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223403806191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38181540 + ... + 38291993.

It is an arithmetic number, because the mean of its divisors is an integer number (361337448150).

Almost surely, 2^{4223403806991} is an apocalyptic number.

4223403806991 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

4223403806991 is a deficient number, since it is larger than the sum of its proper divisors (1557995363409).

4223403806991 is a wasteful number, since it uses less digits than its factorization.

4223403806991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76474026.

The product of its (nonzero) digits is 2239488, while the sum is 51.

The spelling of 4223403806991 in words is "four trillion, two hundred twenty-three billion, four hundred three million, eight hundred six thousand, nine hundred ninety-one".