163440421465610 has 8 divisors (see below), whose sum is σ = 294192758638116. Its totient is φ = 65376168586240.

The previous prime is 163440421465571. The next prime is 163440421465631. The reversal of 163440421465610 is 16564124044361.

It can be written as a sum of positive squares in 2 ways, for example, as 150936679925641 + 12503741539969 = 12285629^2 + 3536063^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8172021073271 + ... + 8172021073290.

Almost surely, 2^{163440421465610} is an apocalyptic number.

163440421465610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163440421465610 is a deficient number, since it is larger than the sum of its proper divisors (130752337172506).

163440421465610 is a wasteful number, since it uses less digits than its factorization.

163440421465610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16344042146568.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 163440421465610 in words is "one hundred sixty-three trillion, four hundred forty billion, four hundred twenty-one million, four hundred sixty-five thousand, six hundred ten".