178428879311 has 4 divisors (see below), whose sum is σ = 180687472800. Its totient is φ = 176170285824.

The previous prime is 178428879281. The next prime is 178428879319. The reversal of 178428879311 is 113978824871.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 178428879311 - 2⁶ = 178428879247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (178428879319) 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, 1129296626 + ... + 1129296783.

It is an arithmetic number, because the mean of its divisors is an integer number (45171868200).

Almost surely, 2^178428879311 is an apocalyptic number.

178428879311 is a deficient number, since it is larger than the sum of its proper divisors (2258593489).

178428879311 is an equidigital number, since it uses as much as digits as its factorization.

178428879311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2258593488.

The product of its digits is 5419008, while the sum is 59.

The spelling of 178428879311 in words is "one hundred seventy-eight billion, four hundred twenty-eight million, eight hundred seventy-nine thousand, three hundred eleven".