1556242666344 has 48 divisors (see below), whose sum is σ = 4370928481920. Its totient is φ = 518747554800.

The previous prime is 1556242666343. The next prime is 1556242666387. The reversal of 1556242666344 is 4436662426551.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1556242666343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 400266232 + ... + 400270119.

It is an arithmetic number, because the mean of its divisors is an integer number (91061010040).

Almost surely, 2^{1556242666344} is an apocalyptic number.

It is an amenable number.

1556242666344 is an abundant number, since it is smaller than the sum of its proper divisors (2814685815576).

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

1556242666344 is an equidigital number, since it uses as much as digits as its factorization.

1556242666344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800536372 (or 800536356 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 54.

The spelling of 1556242666344 in words is "one trillion, five hundred fifty-six billion, two hundred forty-two million, six hundred sixty-six thousand, three hundred forty-four".