164874978 has 24 divisors (see below), whose sum is σ = 358930416. Its totient is φ = 54696600.

The previous prime is 164874977. The next prime is 164874991. The reversal of 164874978 is 879478461.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (164874977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17908 + ... + 25503.

It is an arithmetic number, because the mean of its divisors is an integer number (14955434).

Almost surely, 2^164874978 is an apocalyptic number.

164874978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

164874978 is an abundant number, since it is smaller than the sum of its proper divisors (194055438).

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

164874978 is a wasteful number, since it uses less digits than its factorization.

164874978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43630 (or 43627 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 164874978 is about 12840.3651817228. The cubic root of 164874978 is about 548.3420906473.

The spelling of 164874978 in words is "one hundred sixty-four million, eight hundred seventy-four thousand, nine hundred seventy-eight".