255064521491 has 16 divisors (see below), whose sum is σ = 278862998400. Its totient is φ = 231877945728.

The previous prime is 255064521427. The next prime is 255064521553. The reversal of 255064521491 is 194125460552.

It is not a de Polignac number, because 255064521491 - 2⁶ = 255064521427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255064526491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94925 + ... + 720513.

It is an arithmetic number, because the mean of its divisors is an integer number (17428937400).

Almost surely, 2^255064521491 is an apocalyptic number.

255064521491 is a deficient number, since it is larger than the sum of its proper divisors (23798476909).

255064521491 is a wasteful number, since it uses less digits than its factorization.

255064521491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626078.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 255064521491 in words is "two hundred fifty-five billion, sixty-four million, five hundred twenty-one thousand, four hundred ninety-one".