163641006257 has 8 divisors (see below), whose sum is σ = 170802792384. Its totient is φ = 156483133488.

The previous prime is 163641006253. The next prime is 163641006301. The reversal of 163641006257 is 752600146361.

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

It is a cyclic number.

It is not a de Polignac number, because 163641006257 - 2² = 163641006253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163641006253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892718 + ... + 1060295.

It is an arithmetic number, because the mean of its divisors is an integer number (21350349048).

Almost surely, 2^163641006257 is an apocalyptic number.

It is an amenable number.

163641006257 is a deficient number, since it is larger than the sum of its proper divisors (7161786127).

163641006257 is a wasteful number, since it uses less digits than its factorization.

163641006257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956679.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 163641006257 in words is "one hundred sixty-three billion, six hundred forty-one million, six thousand, two hundred fifty-seven".