1556545142604 has 12 divisors (see below), whose sum is σ = 3631938666104. Its totient is φ = 518848380864.

The previous prime is 1556545142591. The next prime is 1556545142617. The reversal of 1556545142604 is 4062415456551.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1556545142591) and next prime (1556545142617).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64856047597 + ... + 64856047620.

Almost surely, 2^{1556545142604} is an apocalyptic number.

It is an amenable number.

1556545142604 is an abundant number, since it is smaller than the sum of its proper divisors (2075393523500).

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

1556545142604 is a wasteful number, since it uses less digits than its factorization.

1556545142604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129712095224 (or 129712095222 counting only the distinct ones).

The product of its (nonzero) digits is 2880000, while the sum is 48.

The spelling of 1556545142604 in words is "one trillion, five hundred fifty-six billion, five hundred forty-five million, one hundred forty-two thousand, six hundred four".