168447450971520 has 768 divisors, whose sum is σ = 706791020158080. Its totient is φ = 36087036641280.

The previous prime is 168447450971483. The next prime is 168447450971551. The reversal of 168447450971520 is 25179054744861.

It is a happy number.

168447450971520 is a `hidden beast` number, since 1 + 6 + 8 + 4 + 4 + 7 + 4 + 509 + 71 + 52 + 0 = 666.

It is a super-2 number, since 2×168447450971520² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 164681184 + ... + 165700896.

Almost surely, 2^{168447450971520} is an apocalyptic number.

168447450971520 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 168447450971520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353395510079040).

168447450971520 is an abundant number, since it is smaller than the sum of its proper divisors (538343569186560).

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

168447450971520 is a wasteful number, since it uses less digits than its factorization.

168447450971520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020003 (or 1019988 counting only the distinct ones).

The product of its (nonzero) digits is 67737600, while the sum is 63.

The spelling of 168447450971520 in words is "one hundred sixty-eight trillion, four hundred forty-seven billion, four hundred fifty million, nine hundred seventy-one thousand, five hundred twenty".