163490291805 has 32 divisors (see below), whose sum is σ = 266107420800. Its totient is φ = 85688164352.

The previous prime is 163490291771. The next prime is 163490291807. The reversal of 163490291805 is 508192094361.

It is a cyclic number.

It is not a de Polignac number, because 163490291805 - 2¹⁹ = 163489767517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163490291807) 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 in 31 ways as a sum of consecutive naturals, for example, 2746801 + ... + 2805689.

It is an arithmetic number, because the mean of its divisors is an integer number (8315856900).

Almost surely, 2^163490291805 is an apocalyptic number.

163490291805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163490291805 is a deficient number, since it is larger than the sum of its proper divisors (102617128995).

163490291805 is a wasteful number, since it uses less digits than its factorization.

163490291805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62093.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 163490291805 in words is "one hundred sixty-three billion, four hundred ninety million, two hundred ninety-one thousand, eight hundred five".