1550512205256 has 128 divisors (see below), whose sum is σ = 4441319424000. Its totient is φ = 441875926272.

The previous prime is 1550512205251. The next prime is 1550512205273. The reversal of 1550512205256 is 6525022150551.

It is not an unprimeable number, because it can be changed into a prime (1550512205251) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 315206365 + ... + 315211283.

It is an arithmetic number, because the mean of its divisors is an integer number (34697808000).

Almost surely, 2^{1550512205256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1550512205256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2220659712000).

1550512205256 is an abundant number, since it is smaller than the sum of its proper divisors (2890807218744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1550512205256 is a wasteful number, since it uses less digits than its factorization.

1550512205256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9331 (or 9327 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 39.

The spelling of 1550512205256 in words is "one trillion, five hundred fifty billion, five hundred twelve million, two hundred five thousand, two hundred fifty-six".