164428561683 has 10 divisors (see below), whose sum is σ = 245627851524. Its totient is φ = 109619041068.

The previous prime is 164428561597. The next prime is 164428561691. The reversal of 164428561683 is 386165824461.

164428561683 is a `hidden beast` number, since 1 + 6 + 4 + 428 + 56 + 168 + 3 = 666.

It is not a de Polignac number, because 164428561683 - 2¹⁷ = 164428430611 is a prime.

It is a super-3 number, since 3×164428561683³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (164428561783) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1014991041 + ... + 1014991202.

Almost surely, 2^164428561683 is an apocalyptic number.

164428561683 is a deficient number, since it is larger than the sum of its proper divisors (81199289841).

164428561683 is an equidigital number, since it uses as much as digits as its factorization.

164428561683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029982255 (or 2029982246 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 164428561683 in words is "one hundred sixty-four billion, four hundred twenty-eight million, five hundred sixty-one thousand, six hundred eighty-three".