165907478584 has 8 divisors (see below), whose sum is σ = 311076522360. Its totient is φ = 82953739288.

The previous prime is 165907478567. The next prime is 165907478593. The reversal of 165907478584 is 485874709561.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10369217404 + ... + 10369217419.

It is an arithmetic number, because the mean of its divisors is an integer number (38884565295).

Almost surely, 2^165907478584 is an apocalyptic number.

It is an amenable number.

165907478584 is a deficient number, since it is larger than the sum of its proper divisors (145169043776).

165907478584 is a wasteful number, since it uses less digits than its factorization.

165907478584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20738434829 (or 20738434825 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 64.

The spelling of 165907478584 in words is "one hundred sixty-five billion, nine hundred seven million, four hundred seventy-eight thousand, five hundred eighty-four".