164442425640416 has 48 divisors (see below), whose sum is σ = 403631408396160. Its totient is φ = 64068477521280.

The previous prime is 164442425640377. The next prime is 164442425640433. The reversal of 164442425640416 is 614046524244461.

It is a happy number.

It is a super-2 number, since 2×164442425640416² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33368996246 + ... + 33369001173.

It is an arithmetic number, because the mean of its divisors is an integer number (8408987674920).

Almost surely, 2^{164442425640416} is an apocalyptic number.

164442425640416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

164442425640416 is an abundant number, since it is smaller than the sum of its proper divisors (239188982755744).

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

164442425640416 is a wasteful number, since it uses less digits than its factorization.

164442425640416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66737997447 (or 66737997439 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 53.

Adding to 164442425640416 its reverse (614046524244461), we get a palindrome (778488949884877).

The spelling of 164442425640416 in words is "one hundred sixty-four trillion, four hundred forty-two billion, four hundred twenty-five million, six hundred forty thousand, four hundred sixteen".