1553388833345 has 4 divisors (see below), whose sum is σ = 1864066600020. Its totient is φ = 1242711066672.

The previous prime is 1553388833341. The next prime is 1553388833357. The reversal of 1553388833345 is 5433388833551.

It is a happy number.

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 760284595249 + 793104238096 = 871943^2 + 890564^2 .

It is a cyclic number.

It is not a de Polignac number, because 1553388833345 - 2² = 1553388833341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1553388833341) 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, 155338883330 + ... + 155338883339.

It is an arithmetic number, because the mean of its divisors is an integer number (466016650005).

Almost surely, 2^{1553388833345} is an apocalyptic number.

It is an amenable number.

1553388833345 is a deficient number, since it is larger than the sum of its proper divisors (310677766675).

1553388833345 is an equidigital number, since it uses as much as digits as its factorization.

1553388833345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310677766674.

The product of its digits is 62208000, while the sum is 59.

The spelling of 1553388833345 in words is "one trillion, five hundred fifty-three billion, three hundred eighty-eight million, eight hundred thirty-three thousand, three hundred forty-five".