163885790970 has 80 divisors (see below), whose sum is σ = 480731679648. Its totient is φ = 39729886560.

The previous prime is 163885790969. The next prime is 163885790977. The reversal of 163885790970 is 79097588361.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 163885790898 and 163885790907.

It is not an unprimeable number, because it can be changed into a prime (163885790977) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9187824 + ... + 9205643.

Almost surely, 2^163885790970 is an apocalyptic number.

163885790970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163885790970 is an abundant number, since it is smaller than the sum of its proper divisors (316845888678).

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

163885790970 is a wasteful number, since it uses less digits than its factorization.

163885790970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18393497 (or 18393488 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 63.

The spelling of 163885790970 in words is "one hundred sixty-three billion, eight hundred eighty-five million, seven hundred ninety thousand, nine hundred seventy".