1555324555103 has 6 divisors (see below), whose sum is σ = 1709571618552. Its totient is φ = 1413931413620.

The previous prime is 1555324555069. The next prime is 1555324555129. The reversal of 1555324555103 is 3015554235551.

It is a happy number.

It is not a de Polignac number, because 1555324555103 - 2⁶ = 1555324555039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555324555403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6426960851 + ... + 6426961092.

It is an arithmetic number, because the mean of its divisors is an integer number (284928603092).

Almost surely, 2^{1555324555103} is an apocalyptic number.

1555324555103 is a deficient number, since it is larger than the sum of its proper divisors (154247063449).

1555324555103 is a wasteful number, since it uses less digits than its factorization.

1555324555103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12853921965 (or 12853921954 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 44.

The spelling of 1555324555103 in words is "one trillion, five hundred fifty-five billion, three hundred twenty-four million, five hundred fifty-five thousand, one hundred three".