163541557472 has 96 divisors (see below), whose sum is σ = 354245197824. Its totient is φ = 73983744000.

The previous prime is 163541557469. The next prime is 163541557481. The reversal of 163541557472 is 274755145361.

It is a self number, because there is not a number n which added to its sum of digits gives 163541557472.

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, 2514353 + ... + 2578575.

It is an arithmetic number, because the mean of its divisors is an integer number (3690054144).

Almost surely, 2^163541557472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163541557472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177122598912).

163541557472 is an abundant number, since it is smaller than the sum of its proper divisors (190703640352).

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

163541557472 is a wasteful number, since it uses less digits than its factorization.

163541557472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64432 (or 64424 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 50.

The spelling of 163541557472 in words is "one hundred sixty-three billion, five hundred forty-one million, five hundred fifty-seven thousand, four hundred seventy-two".