163103561321555 has 16 divisors (see below), whose sum is σ = 198210097353600. Its totient is φ = 128825771568000.

The previous prime is 163103561321543. The next prime is 163103561321557. The reversal of 163103561321555 is 555123165301361.

It is not a de Polignac number, because 163103561321555 - 2¹⁴ = 163103561305171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163103561321557) 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, 808805 + ... + 18079305.

It is an arithmetic number, because the mean of its divisors is an integer number (12388131084600).

Almost surely, 2^{163103561321555} is an apocalyptic number.

163103561321555 is a deficient number, since it is larger than the sum of its proper divisors (35106536032045).

163103561321555 is a wasteful number, since it uses less digits than its factorization.

163103561321555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17294494.

The product of its (nonzero) digits is 1215000, while the sum is 47.

The spelling of 163103561321555 in words is "one hundred sixty-three trillion, one hundred three billion, five hundred sixty-one million, three hundred twenty-one thousand, five hundred fifty-five".