163495909920 has 768 divisors, whose sum is σ = 621343457280. Its totient is φ = 35367321600.

The previous prime is 163495909919. The next prime is 163495909921. The reversal of 163495909920 is 29909594361.

It is an interprime number because it is at equal distance from previous prime (163495909919) and next prime (163495909921).

It is not an unprimeable number, because it can be changed into a prime (163495909921) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 903292230 + ... + 903292410.

It is an arithmetic number, because the mean of its divisors is an integer number (809040960).

Almost surely, 2^163495909920 is an apocalyptic number.

163495909920 is a gapful number since it is divisible by the number (10) 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 163495909920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310671728640).

163495909920 is an abundant number, since it is smaller than the sum of its proper divisors (457847547360).

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

163495909920 is a wasteful number, since it uses less digits than its factorization.

163495909920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 57.

The spelling of 163495909920 in words is "one hundred sixty-three billion, four hundred ninety-five million, nine hundred nine thousand, nine hundred twenty".