163618986952 has 8 divisors (see below), whose sum is σ = 306785600550. Its totient is φ = 81809493472.

The previous prime is 163618986919. The next prime is 163618987013. The reversal of 163618986952 is 259689816361.

It can be written as a sum of positive squares in only one way, i.e., 90592572196 + 73026414756 = 300986^2 + 270234^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10226186677 + ... + 10226186692.

Almost surely, 2^163618986952 is an apocalyptic number.

It is an amenable number.

163618986952 is a deficient number, since it is larger than the sum of its proper divisors (143166613598).

163618986952 is a wasteful number, since it uses less digits than its factorization.

163618986952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20452373375 (or 20452373371 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 64.

The spelling of 163618986952 in words is "one hundred sixty-three billion, six hundred eighteen million, nine hundred eighty-six thousand, nine hundred fifty-two".