163561499648 has 176 divisors, whose sum is σ = 352149504000. Its totient is φ = 75757731840.

The previous prime is 163561499609. The next prime is 163561499659. The reversal of 163561499648 is 846994165361.

It is a Harshad number since it is a multiple of its sum of digits (62).

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, 116912453 + ... + 116913851.

Almost surely, 2^163561499648 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 163561499648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176074752000).

163561499648 is an abundant number, since it is smaller than the sum of its proper divisors (188588004352).

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

163561499648 is a wasteful number, since it uses less digits than its factorization.

163561499648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606 (or 1588 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 62.

The spelling of 163561499648 in words is "one hundred sixty-three billion, five hundred sixty-one million, four hundred ninety-nine thousand, six hundred forty-eight".