163503540 has 36 divisors (see below), whose sum is σ = 495961284. Its totient is φ = 43600896.

The previous prime is 163503427. The next prime is 163503551. The reversal of 163503540 is 45305361.

163503540 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 129140496 + 34363044 = 11364^2 + 5862^2 .

It is a tau number, because it is divible by the number of its divisors (36).

163503540 is strictly pandigital in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 453997 + ... + 454356.

Almost surely, 2^163503540 is an apocalyptic number.

163503540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163503540 is an abundant number, since it is smaller than the sum of its proper divisors (332457744).

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

163503540 is a wasteful number, since it uses less digits than its factorization.

163503540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908368 (or 908363 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 163503540 is about 12786.8502767492. The cubic root of 163503540 is about 546.8174768993.

The spelling of 163503540 in words is "one hundred sixty-three million, five hundred three thousand, five hundred forty".