164128723837 has 8 divisors (see below), whose sum is σ = 179651617880. Its totient is φ = 149019773760.

The previous prime is 164128723819. The next prime is 164128723867. The reversal of 164128723837 is 738327821461.

It can be written as a sum of positive squares in 4 ways, for example, as 10334552281 + 153794171556 = 101659^2 + 392166^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 164128723837 - 2¹¹ = 164128721789 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 (164128723817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103485162 + ... + 103486747.

It is an arithmetic number, because the mean of its divisors is an integer number (22456452235).

Almost surely, 2^164128723837 is an apocalyptic number.

It is an amenable number.

164128723837 is a deficient number, since it is larger than the sum of its proper divisors (15522894043).

164128723837 is a wasteful number, since it uses less digits than its factorization.

164128723837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206971983.

The product of its digits is 2709504, while the sum is 52.

The spelling of 164128723837 in words is "one hundred sixty-four billion, one hundred twenty-eight million, seven hundred twenty-three thousand, eight hundred thirty-seven".