163115253603 has 20 divisors (see below), whose sum is σ = 243865380528. Its totient is φ = 108654521040.

The previous prime is 163115253571. The next prime is 163115253607. The reversal of 163115253603 is 306352511361.

163115253603 is a `hidden beast` number, since 1 + 6 + 3 + 115 + 2 + 536 + 0 + 3 = 666.

It is not a de Polignac number, because 163115253603 - 2⁵ = 163115253571 is a prime.

It is a super-3 number, since 3×163115253603³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (163115253607) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 724228 + ... + 922353.

Almost surely, 2^163115253603 is an apocalyptic number.

163115253603 is a deficient number, since it is larger than the sum of its proper divisors (80750126925).

163115253603 is a wasteful number, since it uses less digits than its factorization.

163115253603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647816 (or 1647807 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

Adding to 163115253603 its reverse (306352511361), we get a palindrome (469467764964).

The spelling of 163115253603 in words is "one hundred sixty-three billion, one hundred fifteen million, two hundred fifty-three thousand, six hundred three".