164216677631 has 4 divisors (see below), whose sum is σ = 164302522032. Its totient is φ = 164130833232.

The previous prime is 164216677609. The next prime is 164216677637. The reversal of 164216677631 is 136776612461.

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 164216677631 - 2¹⁰ = 164216676607 is a prime.

It is a super-2 number, since 2×164216677631² (a number of 23 digits) contains 22 as substring.

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 164216677631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164216677637) 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, 42919331 + ... + 42923156.

It is an arithmetic number, because the mean of its divisors is an integer number (41075630508).

Almost surely, 2^164216677631 is an apocalyptic number.

164216677631 is a deficient number, since it is larger than the sum of its proper divisors (85844401).

164216677631 is an equidigital number, since it uses as much as digits as its factorization.

164216677631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85844400.

The product of its digits is 1524096, while the sum is 50.

The spelling of 164216677631 in words is "one hundred sixty-four billion, two hundred sixteen million, six hundred seventy-seven thousand, six hundred thirty-one".