163521752647 has 8 divisors (see below), whose sum is σ = 178950106512. Its totient is φ = 148187188800.

The previous prime is 163521752633. The next prime is 163521752663. The reversal of 163521752647 is 746257125361.

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 163521752647 - 2¹¹ = 163521750599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163521752647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163521752677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23443854 + ... + 23450827.

It is an arithmetic number, because the mean of its divisors is an integer number (22368763314).

Almost surely, 2^163521752647 is an apocalyptic number.

163521752647 is a deficient number, since it is larger than the sum of its proper divisors (15428353865).

163521752647 is a wasteful number, since it uses less digits than its factorization.

163521752647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46895009.

The product of its digits is 2116800, while the sum is 49.

The spelling of 163521752647 in words is "one hundred sixty-three billion, five hundred twenty-one million, seven hundred fifty-two thousand, six hundred forty-seven".