1555657255 has 16 divisors (see below), whose sum is σ = 1915976160. Its totient is φ = 1212152832.

The previous prime is 1555657241. The next prime is 1555657261. The reversal of 1555657255 is 5527565551.

It is a cyclic number.

It is not a de Polignac number, because 1555657255 - 2⁹ = 1555656743 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3727 + ... + 55903.

It is an arithmetic number, because the mean of its divisors is an integer number (119748510).

Almost surely, 2^1555657255 is an apocalyptic number.

1555657255 is a deficient number, since it is larger than the sum of its proper divisors (360318905).

1555657255 is an equidigital number, since it uses as much as digits as its factorization.

1555657255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52338.

The product of its digits is 1312500, while the sum is 46.

The square root of 1555657255 is about 39441.8211420315. The cubic root of 1555657255 is about 1158.7007984580.

The spelling of 1555657255 in words is "one billion, five hundred fifty-five million, six hundred fifty-seven thousand, two hundred fifty-five".