163038772505 has 32 divisors (see below), whose sum is σ = 226987764480. Its totient is φ = 110102952960.

The previous prime is 163038772499. The next prime is 163038772517. The reversal of 163038772505 is 505277830361.

It is not a de Polignac number, because 163038772505 - 2⁴ = 163038772489 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 163038772505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18776765 + ... + 18785445.

It is an arithmetic number, because the mean of its divisors is an integer number (7093367640).

Almost surely, 2^163038772505 is an apocalyptic number.

It is an amenable number.

163038772505 is a deficient number, since it is larger than the sum of its proper divisors (63948991975).

163038772505 is an equidigital number, since it uses as much as digits as its factorization.

163038772505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16769.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 163038772505 in words is "one hundred sixty-three billion, thirty-eight million, seven hundred seventy-two thousand, five hundred five".