164002943999 has 4 divisors (see below), whose sum is σ = 169658217960. Its totient is φ = 158347670040.

The previous prime is 164002943959. The next prime is 164002944013. The reversal of 164002943999 is 999349200461.

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 164002943999 - 2⁸ = 164002943743 is a prime.

It is a super-2 number, since 2×164002943999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164002943959) 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, 2827636937 + ... + 2827636994.

It is an arithmetic number, because the mean of its divisors is an integer number (42414554490).

Almost surely, 2^164002943999 is an apocalyptic number.

164002943999 is a deficient number, since it is larger than the sum of its proper divisors (5655273961).

164002943999 is an equidigital number, since it uses as much as digits as its factorization.

164002943999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5655273960.

The product of its (nonzero) digits is 3779136, while the sum is 56.

The spelling of 164002943999 in words is "one hundred sixty-four billion, two million, nine hundred forty-three thousand, nine hundred ninety-nine".