228431663178756 has 12 divisors (see below), whose sum is σ = 533007214083792. Its totient is φ = 76143887726248.

The previous prime is 228431663178727. The next prime is 228431663178767. The reversal of 228431663178756 is 657871366134822.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×228431663178756² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (69) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9517985965770 + ... + 9517985965793.

It is an arithmetic number, because the mean of its divisors is an integer number (44417267840316).

Almost surely, 2^{228431663178756} is an apocalyptic number.

It is an amenable number.

228431663178756 is an abundant number, since it is smaller than the sum of its proper divisors (304575550905036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228431663178756 is a wasteful number, since it uses less digits than its factorization.

228431663178756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19035971931570 (or 19035971931568 counting only the distinct ones).

The product of its digits is 487710720, while the sum is 69.

The spelling of 228431663178756 in words is "two hundred twenty-eight trillion, four hundred thirty-one billion, six hundred sixty-three million, one hundred seventy-eight thousand, seven hundred fifty-six".