164643085951 has 4 divisors (see below), whose sum is σ = 164875305400. Its totient is φ = 164410866504.

The previous prime is 164643085931. The next prime is 164643085969. The reversal of 164643085951 is 159580346461.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164643085951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164643085931) 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, 116108661 + ... + 116110078.

It is an arithmetic number, because the mean of its divisors is an integer number (41218826350).

Almost surely, 2^164643085951 is an apocalyptic number.

164643085951 is a deficient number, since it is larger than the sum of its proper divisors (232219449).

164643085951 is an equidigital number, since it uses as much as digits as its factorization.

164643085951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232219448.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 164643085951 in words is "one hundred sixty-four billion, six hundred forty-three million, eighty-five thousand, nine hundred fifty-one".