164446497280 has 160 divisors (see below), whose sum is σ = 425029296384. Its totient is φ = 60659613696.

The previous prime is 164446497269. The next prime is 164446497287. The reversal of 164446497280 is 82794644461.

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×164446497280² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164446497287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49485699 + ... + 49489021.

Almost surely, 2^164446497280 is an apocalyptic number.

164446497280 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 164446497280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212514648192).

164446497280 is an abundant number, since it is smaller than the sum of its proper divisors (260582799104).

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

164446497280 is a wasteful number, since it uses less digits than its factorization.

164446497280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4830 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 55.

The spelling of 164446497280 in words is "one hundred sixty-four billion, four hundred forty-six million, four hundred ninety-seven thousand, two hundred eighty".