1226680161 has 16 divisors (see below), whose sum is σ = 1907376000. Its totient is φ = 700959504.

The previous prime is 1226680121. The next prime is 1226680187. The reversal of 1226680161 is 1610866221.

It is a de Polignac number, because none of the positive numbers 2^k-1226680161 is a prime.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1226680121) 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, 595026 + ... + 597083.

It is an arithmetic number, because the mean of its divisors is an integer number (119211000).

Almost surely, 2^1226680161 is an apocalyptic number.

It is an amenable number.

1226680161 is a deficient number, since it is larger than the sum of its proper divisors (680695839).

1226680161 is an equidigital number, since it uses as much as digits as its factorization.

1226680161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192133 (or 1192119 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1226680161 is about 35023.9940754906. The cubic root of 1226680161 is about 1070.4764410965.

The spelling of 1226680161 in words is "one billion, two hundred twenty-six million, six hundred eighty thousand, one hundred sixty-one".