164856400424 has 8 divisors (see below), whose sum is σ = 309105750810. Its totient is φ = 82428200208.

The previous prime is 164856400403. The next prime is 164856400459. The reversal of 164856400424 is 424004658461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 85772836900 + 79083563524 = 292870^2 + 281218^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303525019 + ... + 10303525034.

Almost surely, 2^164856400424 is an apocalyptic number.

It is an amenable number.

164856400424 is a deficient number, since it is larger than the sum of its proper divisors (144249350386).

164856400424 is a wasteful number, since it uses less digits than its factorization.

164856400424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20607050059 (or 20607050055 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 44.

The spelling of 164856400424 in words is "one hundred sixty-four billion, eight hundred fifty-six million, four hundred thousand, four hundred twenty-four".