163645540 has 24 divisors (see below), whose sum is σ = 350969472. Its totient is φ = 64065120.

The previous prime is 163645459. The next prime is 163645589. The reversal of 163645540 is 45546361.

It is a junction number, because it is equal to n+sod(n) for n = 163645496 and 163645505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86106 + ... + 87985.

It is an arithmetic number, because the mean of its divisors is an integer number (14623728).

Almost surely, 2^163645540 is an apocalyptic number.

163645540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163645540 is an abundant number, since it is smaller than the sum of its proper divisors (187323932).

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

163645540 is a wasteful number, since it uses less digits than its factorization.

163645540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174147 (or 174145 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 163645540 is about 12792.4016509802. The cubic root of 163645540 is about 546.9757316052.

It can be divided in two parts, 16364 and 5540, that added together give a square (21904 = 148²).

The spelling of 163645540 in words is "one hundred sixty-three million, six hundred forty-five thousand, five hundred forty".