163950919755 has 32 divisors (see below), whose sum is σ = 299818136064. Its totient is φ = 74943449856.

The previous prime is 163950919753. The next prime is 163950919771. The reversal of 163950919755 is 557919059361.

It is not a de Polignac number, because 163950919755 - 2¹ = 163950919753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163950919753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1592607 + ... + 1692423.

It is an arithmetic number, because the mean of its divisors is an integer number (9369316752).

Almost surely, 2^163950919755 is an apocalyptic number.

163950919755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163950919755 is a deficient number, since it is larger than the sum of its proper divisors (135867216309).

163950919755 is a wasteful number, since it uses less digits than its factorization.

163950919755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115475.

The product of its (nonzero) digits is 11481750, while the sum is 60.

The spelling of 163950919755 in words is "one hundred sixty-three billion, nine hundred fifty million, nine hundred nineteen thousand, seven hundred fifty-five".