163903522513 has 2 divisors, whose sum is σ = 163903522514. Its totient is φ = 163903522512.

The previous prime is 163903522481. The next prime is 163903522571. The reversal of 163903522513 is 315225309361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143877593344 + 20025929169 = 379312^2 + 141513^2 .

It is a cyclic number.

It is not a de Polignac number, because 163903522513 - 2⁵ = 163903522481 is a prime.

It is not a weakly prime, because it can be changed into another prime (163903522583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81951761256 + 81951761257.

It is an arithmetic number, because the mean of its divisors is an integer number (81951761257).

Almost surely, 2^163903522513 is an apocalyptic number.

It is an amenable number.

163903522513 is a deficient number, since it is larger than the sum of its proper divisors (1).

163903522513 is an equidigital number, since it uses as much as digits as its factorization.

163903522513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 40.

The spelling of 163903522513 in words is "one hundred sixty-three billion, nine hundred three million, five hundred twenty-two thousand, five hundred thirteen".