164381656439 has 32 divisors (see below), whose sum is σ = 220975587840. Its totient is φ = 118093334400.

The previous prime is 164381656423. The next prime is 164381656457. The reversal of 164381656439 is 934656183461.

164381656439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 164381656439 - 2⁴ = 164381656423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164381656409) 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 31 ways as a sum of consecutive naturals, for example, 730784 + ... + 928874.

It is an arithmetic number, because the mean of its divisors is an integer number (6905487120).

Almost surely, 2^164381656439 is an apocalyptic number.

164381656439 is a deficient number, since it is larger than the sum of its proper divisors (56593931401).

164381656439 is a wasteful number, since it uses less digits than its factorization.

164381656439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198951.

The product of its digits is 11197440, while the sum is 56.

The spelling of 164381656439 in words is "one hundred sixty-four billion, three hundred eighty-one million, six hundred fifty-six thousand, four hundred thirty-nine".