191763161863 has 16 divisors (see below), whose sum is σ = 236094921216. Its totient is φ = 151674092640.

The previous prime is 191763161839. The next prime is 191763161869. The reversal of 191763161863 is 368161367191.

It is not a de Polignac number, because 191763161863 - 2¹⁷ = 191763030791 is a prime.

It is a super-2 number, since 2×191763161863² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 191763161863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191763161869) 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, 75931 + ... + 623932.

It is an arithmetic number, because the mean of its divisors is an integer number (14755932576).

Almost surely, 2^191763161863 is an apocalyptic number.

191763161863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

191763161863 is a deficient number, since it is larger than the sum of its proper divisors (44331759353).

191763161863 is a wasteful number, since it uses less digits than its factorization.

191763161863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702894.

The product of its digits is 979776, while the sum is 52.

The spelling of 191763161863 in words is "one hundred ninety-one billion, seven hundred sixty-three million, one hundred sixty-one thousand, eight hundred sixty-three".