1256260556350 has 96 divisors (see below), whose sum is σ = 2528047346400. Its totient is φ = 462989260800.

The previous prime is 1256260556339. The next prime is 1256260556351. The reversal of 1256260556350 is 536550626521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1256260556350.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256260556351) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5035762 + ... + 5279338.

It is an arithmetic number, because the mean of its divisors is an integer number (26333826525).

Almost surely, 2^{1256260556350} is an apocalyptic number.

1256260556350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256260556350 is an abundant number, since it is smaller than the sum of its proper divisors (1271786790050).

1256260556350 is a wasteful number, since it uses less digits than its factorization.

1256260556350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243758 (or 243753 counting only the distinct ones).

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 1256260556350 in words is "one trillion, two hundred fifty-six billion, two hundred sixty million, five hundred fifty-six thousand, three hundred fifty".