163968235877 has 4 divisors (see below), whose sum is σ = 163969049676. Its totient is φ = 163967422080.

The previous prime is 163968235853. The next prime is 163968235903. The reversal of 163968235877 is 778532869361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4075417921 + 159892817956 = 63839^2 + 399866^2 .

It is a cyclic number.

It is not a de Polignac number, because 163968235877 - 2⁸ = 163968235621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163968237877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143477 + ... + 590357.

It is an arithmetic number, because the mean of its divisors is an integer number (40992262419).

Almost surely, 2^163968235877 is an apocalyptic number.

It is an amenable number.

163968235877 is a deficient number, since it is larger than the sum of its proper divisors (813799).

163968235877 is an equidigital number, since it uses as much as digits as its factorization.

163968235877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813798.

The product of its digits is 91445760, while the sum is 65.

The spelling of 163968235877 in words is "one hundred sixty-three billion, nine hundred sixty-eight million, two hundred thirty-five thousand, eight hundred seventy-seven".