168177480778 has 4 divisors (see below), whose sum is σ = 252266221170. Its totient is φ = 84088740388.

The previous prime is 168177480769. The next prime is 168177480781. The reversal of 168177480778 is 877084771861.

168177480778 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 877084771861 = 54941 ⋅15964121.

It can be written as a sum of positive squares in only one way, i.e., 144724702329 + 23452778449 = 380427^2 + 153143^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42044370193 + ... + 42044370196.

Almost surely, 2^168177480778 is an apocalyptic number.

168177480778 is a deficient number, since it is larger than the sum of its proper divisors (84088740392).

168177480778 is an equidigital number, since it uses as much as digits as its factorization.

168177480778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84088740391.

The product of its (nonzero) digits is 29503488, while the sum is 64.

The spelling of 168177480778 in words is "one hundred sixty-eight billion, one hundred seventy-seven million, four hundred eighty thousand, seven hundred seventy-eight".