1228656258025 has 24 divisors (see below), whose sum is σ = 1741229804160. Its totient is φ = 842483746560.

The previous prime is 1228656257989. The next prime is 1228656258029. The reversal of 1228656258025 is 5208526568221.

It is not a de Polignac number, because 1228656258025 - 2⁷ = 1228656257897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1228656258029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8263137 + ... + 8410513.

It is an arithmetic number, because the mean of its divisors is an integer number (72551241840).

Almost surely, 2^{1228656258025} is an apocalyptic number.

It is an amenable number.

1228656258025 is a deficient number, since it is larger than the sum of its proper divisors (512573546135).

1228656258025 is a wasteful number, since it uses less digits than its factorization.

1228656258025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195033 (or 195028 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 52.

The spelling of 1228656258025 in words is "one trillion, two hundred twenty-eight billion, six hundred fifty-six million, two hundred fifty-eight thousand, twenty-five".