255513503361 has 4 divisors (see below), whose sum is σ = 340684671152. Its totient is φ = 170342335572.

The previous prime is 255513503359. The next prime is 255513503383. The reversal of 255513503361 is 163305315552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255513503361 - 2¹ = 255513503359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255513503351) 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, 42585583891 + ... + 42585583896.

It is an arithmetic number, because the mean of its divisors is an integer number (85171167788).

Almost surely, 2^255513503361 is an apocalyptic number.

It is an amenable number.

255513503361 is a deficient number, since it is larger than the sum of its proper divisors (85171167791).

255513503361 is an equidigital number, since it uses as much as digits as its factorization.

255513503361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85171167790.

The product of its (nonzero) digits is 202500, while the sum is 39.

The spelling of 255513503361 in words is "two hundred fifty-five billion, five hundred thirteen million, five hundred three thousand, three hundred sixty-one".