163471081578 has 48 divisors (see below), whose sum is σ = 380863495584. Its totient is φ = 46639336800.

The previous prime is 163471081531. The next prime is 163471081583. The reversal of 163471081578 is 875180174361.

It is a super-2 number, since 2×163471081578² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 163471081578.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190500 + ... + 602687.

It is an arithmetic number, because the mean of its divisors is an integer number (7934656158).

Almost surely, 2^163471081578 is an apocalyptic number.

163471081578 is an abundant number, since it is smaller than the sum of its proper divisors (217392414006).

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

163471081578 is a wasteful number, since it uses less digits than its factorization.

163471081578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793907 (or 793900 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 51.

The spelling of 163471081578 in words is "one hundred sixty-three billion, four hundred seventy-one million, eighty-one thousand, five hundred seventy-eight".