164780441136870 has 32 divisors (see below), whose sum is σ = 425894063247072. Its totient is φ = 40561339356672.

The previous prime is 164780441136823. The next prime is 164780441136893. The reversal of 164780441136870 is 78631144087461.

It is a super-2 number, since 2×164780441136870² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211256975427 + ... + 211256976206.

It is an arithmetic number, because the mean of its divisors is an integer number (13309189476471).

Almost surely, 2^{164780441136870} is an apocalyptic number.

164780441136870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164780441136870 is an abundant number, since it is smaller than the sum of its proper divisors (261113622110202).

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

164780441136870 is a wasteful number, since it uses less digits than its factorization.

164780441136870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422513951656.

The product of its (nonzero) digits is 21676032, while the sum is 60.

The spelling of 164780441136870 in words is "one hundred sixty-four trillion, seven hundred eighty billion, four hundred forty-one million, one hundred thirty-six thousand, eight hundred seventy".