164545478578 has 32 divisors (see below), whose sum is σ = 268883480880. Its totient is φ = 75064872960.

The previous prime is 164545478569. The next prime is 164545478597. The reversal of 164545478578 is 875874545461.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 9697719529 + 154847759049 = 98477^2 + 393507^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7766776 + ... + 7787932.

Almost surely, 2^164545478578 is an apocalyptic number.

164545478578 is a deficient number, since it is larger than the sum of its proper divisors (104338002302).

164545478578 is a wasteful number, since it uses less digits than its factorization.

164545478578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24622.

The product of its digits is 150528000, while the sum is 64.

The spelling of 164545478578 in words is "one hundred sixty-four billion, five hundred forty-five million, four hundred seventy-eight thousand, five hundred seventy-eight".