228715636679781 has 16 divisors (see below), whose sum is σ = 311886852496128. Its totient is φ = 149020011896000.

The previous prime is 228715636679701. The next prime is 228715636679819. The reversal of 228715636679781 is 187976636517822.

It is a cyclic number.

It is not a de Polignac number, because 228715636679781 - 2¹³ = 228715636671589 is a prime.

It is a super-2 number, since 2×228715636679781² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 228715636679697 and 228715636679706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228715636679701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1156888830 + ... + 1157086511.

It is an arithmetic number, because the mean of its divisors is an integer number (19492928281008).

Almost surely, 2^{228715636679781} is an apocalyptic number.

It is an amenable number.

228715636679781 is a deficient number, since it is larger than the sum of its proper divisors (83171215816347).

228715636679781 is a wasteful number, since it uses less digits than its factorization.

228715636679781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313976092.

The product of its digits is 2560481280, while the sum is 78.

The spelling of 228715636679781 in words is "two hundred twenty-eight trillion, seven hundred fifteen billion, six hundred thirty-six million, six hundred seventy-nine thousand, seven hundred eighty-one".