1556551535252 has 12 divisors (see below), whose sum is σ = 3113103070560. Its totient is φ = 667093515096.

The previous prime is 1556551535233. The next prime is 1556551535299. The reversal of 1556551535252 is 2525351556551.

It is a happy number.

1556551535252 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 1556551535252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27795563102 + ... + 27795563157.

It is an arithmetic number, because the mean of its divisors is an integer number (259425255880).

Almost surely, 2^{1556551535252} is an apocalyptic number.

It is an amenable number.

1556551535252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1556551535252 is a wasteful number, since it uses less digits than its factorization.

1556551535252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55591126270 (or 55591126268 counting only the distinct ones).

The product of its digits is 5625000, while the sum is 50.

The spelling of 1556551535252 in words is "one trillion, five hundred fifty-six billion, five hundred fifty-one million, five hundred thirty-five thousand, two hundred fifty-two".