227639317661 has 16 divisors (see below), whose sum is σ = 274423603200. Its totient is φ = 184464012528.

The previous prime is 227639317643. The next prime is 227639317669. The reversal of 227639317661 is 166713936722.

It is a cyclic number.

It is not a de Polignac number, because 227639317661 - 2⁶ = 227639317597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (227639317669) 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, 1722905 + ... + 1850318.

It is an arithmetic number, because the mean of its divisors is an integer number (17151475200).

Almost surely, 2^227639317661 is an apocalyptic number.

It is an amenable number.

227639317661 is a deficient number, since it is larger than the sum of its proper divisors (46784285539).

227639317661 is a wasteful number, since it uses less digits than its factorization.

227639317661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573728.

The product of its digits is 3429216, while the sum is 53.

The spelling of 227639317661 in words is "two hundred twenty-seven billion, six hundred thirty-nine million, three hundred seventeen thousand, six hundred sixty-one".