164998741878 has 32 divisors (see below), whose sum is σ = 375606897120. Its totient is φ = 53658126720.

The previous prime is 164998741861. The next prime is 164998741883. The reversal of 164998741878 is 878147899461.

164998741878 is a `hidden beast` number, since 1 + 64 + 9 + 9 + 87 + 418 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37260375 + ... + 37264802.

It is an arithmetic number, because the mean of its divisors is an integer number (11737715535).

Almost surely, 2^164998741878 is an apocalyptic number.

164998741878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164998741878 is an abundant number, since it is smaller than the sum of its proper divisors (210608155242).

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

164998741878 is a wasteful number, since it uses less digits than its factorization.

164998741878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74525229 (or 74525223 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 72.

The spelling of 164998741878 in words is "one hundred sixty-four billion, nine hundred ninety-eight million, seven hundred forty-one thousand, eight hundred seventy-eight".