161782952688 has 150 divisors (see below), whose sum is σ = 528198530184. Its totient is φ = 46223601984.

The previous prime is 161782952687. The next prime is 161782952699. The reversal of 161782952688 is 886259287161.

161782952688 is a `hidden beast` number, since 1 + 6 + 1 + 7 + 8 + 29 + 526 + 88 = 666.

161782952688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161782952687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 111781 + ... + 579707.

Almost surely, 2^161782952688 is an apocalyptic number.

161782952688 is a gapful number since it is divisible by the number (18) 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 161782952688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264099265092).

161782952688 is an abundant number, since it is smaller than the sum of its proper divisors (366415577496).

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

161782952688 is an equidigital number, since it uses as much as digits as its factorization.

161782952688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467969 (or 467939 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 63.

The spelling of 161782952688 in words is "one hundred sixty-one billion, seven hundred eighty-two million, nine hundred fifty-two thousand, six hundred eighty-eight".