1555055455 has 4 divisors (see below), whose sum is σ = 1866066552. Its totient is φ = 1244044360.

The previous prime is 1555055407. The next prime is 1555055473. The reversal of 1555055455 is 5545505551.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5545505551 = 23 ⋅241108937.

It is not a de Polignac number, because 1555055455 - 2¹¹ = 1555053407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155505541 + ... + 155505550.

It is an arithmetic number, because the mean of its divisors is an integer number (466516638).

Almost surely, 2^1555055455 is an apocalyptic number.

1555055455 is a deficient number, since it is larger than the sum of its proper divisors (311011097).

1555055455 is an equidigital number, since it uses as much as digits as its factorization.

1555055455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311011096.

The product of its (nonzero) digits is 312500, while the sum is 40.

The square root of 1555055455 is about 39434.1914460028. The cubic root of 1555055455 is about 1158.5513662112.

The spelling of 1555055455 in words is "one billion, five hundred fifty-five million, fifty-five thousand, four hundred fifty-five".