164978401280 has 672 divisors, whose sum is σ = 527261035392. Its totient is φ = 48129638400.

The previous prime is 164978401267. The next prime is 164978401309. The reversal of 164978401280 is 82104879461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 911482790 + ... + 911482970.

It is an arithmetic number, because the mean of its divisors is an integer number (784614636).

Almost surely, 2^164978401280 is an apocalyptic number.

164978401280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 164978401280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263630517696).

164978401280 is an abundant number, since it is smaller than the sum of its proper divisors (362282634112).

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

164978401280 is a wasteful number, since it uses less digits than its factorization.

164978401280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 164978401280 in words is "one hundred sixty-four billion, nine hundred seventy-eight million, four hundred one thousand, two hundred eighty".