1555225144165 has 24 divisors (see below), whose sum is σ = 2344405512960. Its totient is φ = 969490996320.

The previous prime is 1555225144133. The next prime is 1555225144169. The reversal of 1555225144165 is 5614415225551.

It is not a de Polignac number, because 1555225144165 - 2⁵ = 1555225144133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1555225144169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183611485 + ... + 183619954.

It is an arithmetic number, because the mean of its divisors is an integer number (97683563040).

Almost surely, 2^{1555225144165} is an apocalyptic number.

It is an amenable number.

1555225144165 is a deficient number, since it is larger than the sum of its proper divisors (789180368795).

1555225144165 is a wasteful number, since it uses less digits than its factorization.

1555225144165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367231473 (or 367231462 counting only the distinct ones).

The product of its digits is 1200000, while the sum is 46.

The spelling of 1555225144165 in words is "one trillion, five hundred fifty-five billion, two hundred twenty-five million, one hundred forty-four thousand, one hundred sixty-five".