161420563332 has 144 divisors (see below), whose sum is σ = 468731058432. Its totient is φ = 45882858240.

The previous prime is 161420563307. The next prime is 161420563361. The reversal of 161420563332 is 233365024161.

161420563332 is a `hidden beast` number, since 1 + 6 + 14 + 2 + 0 + 5 + 633 + 3 + 2 = 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59541457 + ... + 59544167.

Almost surely, 2^161420563332 is an apocalyptic number.

161420563332 is a gapful number since it is divisible by the number (12) 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 161420563332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234365529216).

161420563332 is an abundant number, since it is smaller than the sum of its proper divisors (307310495100).

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

161420563332 is a wasteful number, since it uses less digits than its factorization.

161420563332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3858 (or 3853 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 161420563332 its reverse (233365024161), we get a palindrome (394785587493).

The spelling of 161420563332 in words is "one hundred sixty-one billion, four hundred twenty million, five hundred sixty-three thousand, three hundred thirty-two".