228077968064639 has 16 divisors (see below), whose sum is σ = 284357707384320. Its totient is φ = 177722616881760.

The previous prime is 228077968064539. The next prime is 228077968064641. The reversal of 228077968064639 is 936460869770822.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228077968064639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (77).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228077968064639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228077968064539) 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, 26546942 + ... + 34071924.

It is an arithmetic number, because the mean of its divisors is an integer number (17772356711520).

Almost surely, 2^{228077968064639} is an apocalyptic number.

228077968064639 is a deficient number, since it is larger than the sum of its proper divisors (56279739319681).

228077968064639 is a wasteful number, since it uses less digits than its factorization.

228077968064639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7918630.

The product of its (nonzero) digits is 2633637888, while the sum is 77.

The spelling of 228077968064639 in words is "two hundred twenty-eight trillion, seventy-seven billion, nine hundred sixty-eight million, sixty-four thousand, six hundred thirty-nine".