1555045544653 has 4 divisors (see below), whose sum is σ = 1555161424668. Its totient is φ = 1554929664640.

The previous prime is 1555045544651. The next prime is 1555045544659. The reversal of 1555045544653 is 3564455405551.

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 926034762249 + 629010782404 = 962307^2 + 793102^2 .

It is a cyclic number.

It is not a de Polignac number, because 1555045544653 - 2¹ = 1555045544651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1555045544653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555045544651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57919876 + ... + 57946717.

It is an arithmetic number, because the mean of its divisors is an integer number (388790356167).

Almost surely, 2^{1555045544653} is an apocalyptic number.

It is an amenable number.

1555045544653 is a deficient number, since it is larger than the sum of its proper divisors (115880015).

1555045544653 is a wasteful number, since it uses less digits than its factorization.

1555045544653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115880014.

The product of its (nonzero) digits is 18000000, while the sum is 52.

The spelling of 1555045544653 in words is "one trillion, five hundred fifty-five billion, forty-five million, five hundred forty-four thousand, six hundred fifty-three".