1228639233599 has 32 divisors (see below), whose sum is σ = 1360782650880. Its totient is φ = 1104125755392.

The previous prime is 1228639233487. The next prime is 1228639233617. The reversal of 1228639233599 is 9953329368221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1228639233599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228639238599) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25470047 + ... + 25518239.

It is an arithmetic number, because the mean of its divisors is an integer number (42524457840).

Almost surely, 2^{1228639233599} is an apocalyptic number.

1228639233599 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1228639233599 is a deficient number, since it is larger than the sum of its proper divisors (132143417281).

1228639233599 is a wasteful number, since it uses less digits than its factorization.

1228639233599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48719.

The product of its digits is 37791360, while the sum is 62.

The spelling of 1228639233599 in words is "one trillion, two hundred twenty-eight billion, six hundred thirty-nine million, two hundred thirty-three thousand, five hundred ninety-nine".