255501571555 has 16 divisors (see below), whose sum is σ = 307252310400. Its totient is φ = 203968061440.

The previous prime is 255501571543. The next prime is 255501571561. The reversal of 255501571555 is 555175105552.

It is a happy number.

It is not a de Polignac number, because 255501571555 - 2¹¹ = 255501569507 is a prime.

It is a super-3 number, since 3×255501571555³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5040135 + ... + 5090575.

It is an arithmetic number, because the mean of its divisors is an integer number (19203269400).

Almost surely, 2^255501571555 is an apocalyptic number.

255501571555 is a deficient number, since it is larger than the sum of its proper divisors (51750738845).

255501571555 is a wasteful number, since it uses less digits than its factorization.

255501571555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52574.

The product of its (nonzero) digits is 1093750, while the sum is 46.

The spelling of 255501571555 in words is "two hundred fifty-five billion, five hundred one million, five hundred seventy-one thousand, five hundred fifty-five".