163651510325623 has 16 divisors (see below), whose sum is σ = 174079536493824. Its totient is φ = 153312833312640.

The previous prime is 163651510325593. The next prime is 163651510325683. The reversal of 163651510325623 is 326523015156361.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163651510325623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163651510325683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12981208 + ... + 22266898.

It is an arithmetic number, because the mean of its divisors is an integer number (10879971030864).

Almost surely, 2^{163651510325623} is an apocalyptic number.

163651510325623 is a deficient number, since it is larger than the sum of its proper divisors (10428026168201).

163651510325623 is a wasteful number, since it uses less digits than its factorization.

163651510325623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9290502.

The product of its (nonzero) digits is 2916000, while the sum is 49.

The spelling of 163651510325623 in words is "one hundred sixty-three trillion, six hundred fifty-one billion, five hundred ten million, three hundred twenty-five thousand, six hundred twenty-three".