164491361939 has 8 divisors (see below), whose sum is σ = 174343091328. Its totient is φ = 154659162240.

The previous prime is 164491361891. The next prime is 164491361971. The reversal of 164491361939 is 939163194461.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 164491361939 - 2¹² = 164491357843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164491361339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4865072 + ... + 4898765.

It is an arithmetic number, because the mean of its divisors is an integer number (21792886416).

Almost surely, 2^164491361939 is an apocalyptic number.

164491361939 is a deficient number, since it is larger than the sum of its proper divisors (9851729389).

164491361939 is an equidigital number, since it uses as much as digits as its factorization.

164491361939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9764845.

The product of its digits is 3779136, while the sum is 56.

The spelling of 164491361939 in words is "one hundred sixty-four billion, four hundred ninety-one million, three hundred sixty-one thousand, nine hundred thirty-nine".