164547378020 has 12 divisors (see below), whose sum is σ = 345549493884. Its totient is φ = 65818951200.

The previous prime is 164547378013. The next prime is 164547378043. The reversal of 164547378020 is 20873745461.

It can be written as a sum of positive squares in 2 ways, for example, as 61361234944 + 103186143076 = 247712^2 + 321226^2 .

It is a super-2 number, since 2×164547378020² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4113684431 + ... + 4113684470.

It is an arithmetic number, because the mean of its divisors is an integer number (28795791157).

Almost surely, 2^164547378020 is an apocalyptic number.

164547378020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164547378020 is an abundant number, since it is smaller than the sum of its proper divisors (181002115864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164547378020 is a wasteful number, since it uses less digits than its factorization.

164547378020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8227368910 (or 8227368908 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 164547378020 in words is "one hundred sixty-four billion, five hundred forty-seven million, three hundred seventy-eight thousand, twenty".