178105451816 has 32 divisors (see below), whose sum is σ = 346507005600. Its totient is φ = 85722141120.

The previous prime is 178105451813. The next prime is 178105451827. The reversal of 178105451816 is 618154501871.

178105451816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (178105451813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082870 + ... + 1236453.

It is an arithmetic number, because the mean of its divisors is an integer number (10828343925).

Almost surely, 2^178105451816 is an apocalyptic number.

It is an amenable number.

178105451816 is a deficient number, since it is larger than the sum of its proper divisors (168401553784).

178105451816 is a wasteful number, since it uses less digits than its factorization.

178105451816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319689 (or 2319685 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 47.

The spelling of 178105451816 in words is "one hundred seventy-eight billion, one hundred five million, four hundred fifty-one thousand, eight hundred sixteen".