1205220655256 has 8 divisors (see below), whose sum is σ = 2259788728620. Its totient is φ = 602610327624.

The previous prime is 1205220655211. The next prime is 1205220655283. The reversal of 1205220655256 is 6525560225021.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75326290946 + ... + 75326290961.

Almost surely, 2^{1205220655256} is an apocalyptic number.

It is an amenable number.

1205220655256 is a deficient number, since it is larger than the sum of its proper divisors (1054568073364).

1205220655256 is a wasteful number, since it uses less digits than its factorization.

1205220655256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150652581913 (or 150652581909 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 1205220655256 in words is "one trillion, two hundred five billion, two hundred twenty million, six hundred fifty-five thousand, two hundred fifty-six".