1553056420613 has 4 divisors (see below), whose sum is σ = 1590935845548. Its totient is φ = 1515176995680.

The previous prime is 1553056420583. The next prime is 1553056420621. The reversal of 1553056420613 is 3160246503551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 245676852964 + 1307379567649 = 495658^2 + 1143407^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1553056420613 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 37879424893 = 1553056420613 / (1 + 5 + 5 + 3 + 0 + 5 + 6 + 4 + 2 + 0 + 6 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1553056420213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18939712406 + ... + 18939712487.

It is an arithmetic number, because the mean of its divisors is an integer number (397733961387).

Almost surely, 2^{1553056420613} is an apocalyptic number.

It is an amenable number.

1553056420613 is a deficient number, since it is larger than the sum of its proper divisors (37879424935).

1553056420613 is an equidigital number, since it uses as much as digits as its factorization.

1553056420613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37879424934.

The product of its (nonzero) digits is 324000, while the sum is 41.

The spelling of 1553056420613 in words is "one trillion, five hundred fifty-three billion, fifty-six million, four hundred twenty thousand, six hundred thirteen".