1556222087552 has 64 divisors (see below), whose sum is σ = 3392167418640. Its totient is φ = 705274429440.

The previous prime is 1556222087551. The next prime is 1556222087557. The reversal of 1556222087552 is 2557802226551.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1556222087552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1556222087551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1165373 + ... + 2114364.

Almost surely, 2^{1556222087552} is an apocalyptic number.

It is an amenable number.

1556222087552 is an abundant number, since it is smaller than the sum of its proper divisors (1835945331088).

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

1556222087552 is a wasteful number, since it uses less digits than its factorization.

1556222087552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280099 (or 3280087 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 50.

The spelling of 1556222087552 in words is "one trillion, five hundred fifty-six billion, two hundred twenty-two million, eighty-seven thousand, five hundred fifty-two".