163601603255541 has 16 divisors (see below), whose sum is σ = 238048110715968. Its totient is φ = 99118260844800.

The previous prime is 163601603255539. The next prime is 163601603255557. The reversal of 163601603255541 is 145552306106361.

It is not a de Polignac number, because 163601603255541 - 2¹ = 163601603255539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163601603254541) 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, 855552370 + ... + 855743571.

It is an arithmetic number, because the mean of its divisors is an integer number (14878006919748).

Almost surely, 2^{163601603255541} is an apocalyptic number.

163601603255541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163601603255541 is a deficient number, since it is larger than the sum of its proper divisors (74446507460427).

163601603255541 is a wasteful number, since it uses less digits than its factorization.

163601603255541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711298852.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 163601603255541 in words is "one hundred sixty-three trillion, six hundred one billion, six hundred three million, two hundred fifty-five thousand, five hundred forty-one".