164420007243 has 4 divisors (see below), whose sum is σ = 219226676328. Its totient is φ = 109613338160.

The previous prime is 164420007221. The next prime is 164420007251. The reversal of 164420007243 is 342700024461.

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

It is a cyclic number.

It is not a de Polignac number, because 164420007243 - 2⁹ = 164420006731 is a prime.

It is a super-3 number, since 3×164420007243³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (164420007203) 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, 27403334538 + ... + 27403334543.

It is an arithmetic number, because the mean of its divisors is an integer number (54806669082).

Almost surely, 2^164420007243 is an apocalyptic number.

164420007243 is a deficient number, since it is larger than the sum of its proper divisors (54806669085).

164420007243 is an equidigital number, since it uses as much as digits as its factorization.

164420007243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54806669084.

The product of its (nonzero) digits is 32256, while the sum is 33.

The spelling of 164420007243 in words is "one hundred sixty-four billion, four hundred twenty million, seven thousand, two hundred forty-three".