255356364121 has 4 divisors (see below), whose sum is σ = 255357656244. Its totient is φ = 255355072000.

The previous prime is 255356364119. The next prime is 255356364127. The reversal of 255356364121 is 121463653552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166590504025 + 88765860096 = 408155^2 + 297936^2 .

It is a cyclic number.

It is not a de Polignac number, because 255356364121 - 2¹ = 255356364119 is a prime.

It is a super-2 number, since 2×255356364121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255356364127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280780 + ... + 767821.

It is an arithmetic number, because the mean of its divisors is an integer number (63839414061).

Almost surely, 2^255356364121 is an apocalyptic number.

It is an amenable number.

255356364121 is a deficient number, since it is larger than the sum of its proper divisors (1292123).

255356364121 is a wasteful number, since it uses less digits than its factorization.

255356364121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292122.

The product of its digits is 648000, while the sum is 43.

The spelling of 255356364121 in words is "two hundred fifty-five billion, three hundred fifty-six million, three hundred sixty-four thousand, one hundred twenty-one".