16164444477 has 8 divisors (see below), whose sum is σ = 21553185664. Its totient is φ = 10775999808.

The previous prime is 16164444467. The next prime is 16164444481. The reversal of 16164444477 is 77444446161.

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

It is not a de Polignac number, because 16164444477 - 2¹⁰ = 16164443453 is a prime.

It is a super-2 number, since 2×16164444477² (a number of 21 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 (16164444467) 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, 149148 + ... + 233610.

It is an arithmetic number, because the mean of its divisors is an integer number (2694148208).

Almost surely, 2^16164444477 is an apocalyptic number.

It is an amenable number.

16164444477 is a deficient number, since it is larger than the sum of its proper divisors (5388741187).

16164444477 is an equidigital number, since it uses as much as digits as its factorization.

16164444477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148259.

The product of its digits is 1806336, while the sum is 48.

The spelling of 16164444477 in words is "sixteen billion, one hundred sixty-four million, four hundred forty-four thousand, four hundred seventy-seven".