1228639233601 has 16 divisors (see below), whose sum is σ = 1374179461200. Its totient is φ = 1091077751808.

The previous prime is 1228639233487. The next prime is 1228639233617. The reversal of 1228639233601 is 1063329368221.

It is a Cunningham number, because it is equal to 1108440²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 18584232976 + 1210055000625 = 136324^2 + 1100025^2 .

It is a cyclic number.

It is not a de Polignac number, because 1228639233601 - 2²¹ = 1228637136449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228639239601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14307436 + ... + 14393053.

It is an arithmetic number, because the mean of its divisors is an integer number (85886216325).

Almost surely, 2^{1228639233601} is an apocalyptic number.

It is an amenable number.

1228639233601 is a deficient number, since it is larger than the sum of its proper divisors (145540227599).

1228639233601 is a wasteful number, since it uses less digits than its factorization.

1228639233601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28700628.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 1228639233601 in words is "one trillion, two hundred twenty-eight billion, six hundred thirty-nine million, two hundred thirty-three thousand, six hundred one".