228645160781 has 16 divisors (see below), whose sum is σ = 247216440960. Its totient is φ = 210817696320.

The previous prime is 228645160747. The next prime is 228645160823. The reversal of 228645160781 is 187061546822.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228645160781 is a prime.

It is a super-2 number, since 2×228645160781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228645160721) 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, 129266 + ... + 688476.

It is an arithmetic number, because the mean of its divisors is an integer number (15451027560).

Almost surely, 2^228645160781 is an apocalyptic number.

It is an amenable number.

228645160781 is a deficient number, since it is larger than the sum of its proper divisors (18571280179).

228645160781 is a wasteful number, since it uses less digits than its factorization.

228645160781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559876.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 228645160781 in words is "two hundred twenty-eight billion, six hundred forty-five million, one hundred sixty thousand, seven hundred eighty-one".