255121255623 has 8 divisors (see below), whose sum is σ = 366327956848. Its totient is φ = 156997695744.

The previous prime is 255121255621. The next prime is 255121255643. The reversal of 255121255623 is 326552121552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255121255623 - 2¹ = 255121255621 is a prime.

It is a super-2 number, since 2×255121255623² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 6541570657 = 255121255623 / (2 + 5 + 5 + 1 + 2 + 1 + 2 + 5 + 5 + 6 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255121255621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3270785290 + ... + 3270785367.

It is an arithmetic number, because the mean of its divisors is an integer number (45790994606).

Almost surely, 2^255121255623 is an apocalyptic number.

255121255623 is a deficient number, since it is larger than the sum of its proper divisors (111206701225).

255121255623 is a wasteful number, since it uses less digits than its factorization.

255121255623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6541570673.

The product of its digits is 180000, while the sum is 39.

The spelling of 255121255623 in words is "two hundred fifty-five billion, one hundred twenty-one million, two hundred fifty-five thousand, six hundred twenty-three".