163457680 has 40 divisors (see below), whose sum is σ = 380602872. Its totient is φ = 65286144.

The previous prime is 163457647. The next prime is 163457713. The reversal of 163457680 is 86754361.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (163457647) and next prime (163457713).

It can be written as a sum of positive squares in 4 ways, for example, as 3283344 + 160174336 = 1812^2 + 12656^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80032 + ... + 82048.

Almost surely, 2^163457680 is an apocalyptic number.

163457680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163457680 is an abundant number, since it is smaller than the sum of its proper divisors (217145192).

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

163457680 is a wasteful number, since it uses less digits than its factorization.

163457680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3043 (or 3037 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 163457680 is about 12785.0569024936. The cubic root of 163457680 is about 546.7663477425.

It can be divided in two parts, 16345 and 7680, that added together give a square (24025 = 155²).

The spelling of 163457680 in words is "one hundred sixty-three million, four hundred fifty-seven thousand, six hundred eighty".