190928164509 has 6 divisors (see below), whose sum is σ = 275785126526. Its totient is φ = 127285443000.

The previous prime is 190928164501. The next prime is 190928164523. The reversal of 190928164509 is 905461829091.

190928164509 is a `hidden beast` number, since 1 + 90 + 92 + 8 + 16 + 450 + 9 = 666.

190928164509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 190398704409 + 529460100 = 436347^2 + 23010^2 .

It is not a de Polignac number, because 190928164509 - 2³ = 190928164501 is a prime.

It is a super-2 number, since 2×190928164509² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190928164501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10607120242 + ... + 10607120259.

Almost surely, 2^190928164509 is an apocalyptic number.

It is an amenable number.

190928164509 is a deficient number, since it is larger than the sum of its proper divisors (84856962017).

190928164509 is a wasteful number, since it uses less digits than its factorization.

190928164509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21214240507 (or 21214240504 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The spelling of 190928164509 in words is "one hundred ninety billion, nine hundred twenty-eight million, one hundred sixty-four thousand, five hundred nine".