145405171668 has 48 divisors (see below), whose sum is σ = 357577416000. Its totient is φ = 45860606208.

The previous prime is 145405171651. The next prime is 145405171721. The reversal of 145405171668 is 866171504541.

It is a super-2 number, since 2×145405171668² (a number of 23 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 15 ways as a sum of consecutive naturals, for example, 209703 + ... + 578606.

It is an arithmetic number, because the mean of its divisors is an integer number (7449529500).

Almost surely, 2^145405171668 is an apocalyptic number.

It is an amenable number.

145405171668 is an abundant number, since it is smaller than the sum of its proper divisors (212172244332).

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

145405171668 is a wasteful number, since it uses less digits than its factorization.

145405171668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789144 (or 789142 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 145405171668 in words is "one hundred forty-five billion, four hundred five million, one hundred seventy-one thousand, six hundred sixty-eight".