164648647864 has 8 divisors (see below), whose sum is σ = 308716214760. Its totient is φ = 82324323928.

The previous prime is 164648647853. The next prime is 164648647883. The reversal of 164648647864 is 468746846461.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 164648647796 and 164648647805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10290540484 + ... + 10290540499.

It is an arithmetic number, because the mean of its divisors is an integer number (38589526845).

Almost surely, 2^164648647864 is an apocalyptic number.

It is an amenable number.

164648647864 is a deficient number, since it is larger than the sum of its proper divisors (144067566896).

164648647864 is a wasteful number, since it uses less digits than its factorization.

164648647864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20581080989 (or 20581080985 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 64.

The spelling of 164648647864 in words is "one hundred sixty-four billion, six hundred forty-eight million, six hundred forty-seven thousand, eight hundred sixty-four".