161326062720 has 512 divisors, whose sum is σ = 616807872000. Its totient is φ = 39728037888.

The previous prime is 161326062713. The next prime is 161326062739. The reversal of 161326062720 is 27260623161.

161326062720 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 2 + 6 + 0 + 627 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11518762 + ... + 11532758.

It is an arithmetic number, because the mean of its divisors is an integer number (1204702875).

Almost surely, 2^161326062720 is an apocalyptic number.

161326062720 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 161326062720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308403936000).

161326062720 is an abundant number, since it is smaller than the sum of its proper divisors (455481809280).

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

161326062720 is a wasteful number, since it uses less digits than its factorization.

161326062720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14077 (or 14059 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

Adding to 161326062720 its reverse (27260623161), we get a palindrome (188586685881).

The spelling of 161326062720 in words is "one hundred sixty-one billion, three hundred twenty-six million, sixty-two thousand, seven hundred twenty".