163549445540 has 48 divisors (see below), whose sum is σ = 391630628592. Its totient is φ = 56835280896.

The previous prime is 163549445483. The next prime is 163549445551. The reversal of 163549445540 is 45544945361.

It can be written as a sum of positive squares in 8 ways, for example, as 81252196 + 163468193344 = 9014^2 + 404312^2 .

It is a super-2 number, since 2×163549445540² (a number of 23 digits) contains 22 as substring.

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, 18496649 + ... + 18505488.

It is an arithmetic number, because the mean of its divisors is an integer number (8158971429).

Almost surely, 2^163549445540 is an apocalyptic number.

163549445540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163549445540 is an abundant number, since it is smaller than the sum of its proper divisors (228081183052).

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

163549445540 is a wasteful number, since it uses less digits than its factorization.

163549445540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37002176 (or 37002174 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 50.

The spelling of 163549445540 in words is "one hundred sixty-three billion, five hundred forty-nine million, four hundred forty-five thousand, five hundred forty".