1321560536255 has 16 divisors (see below), whose sum is σ = 1592837144640. Its totient is φ = 1052613489408.

The previous prime is 1321560536239. The next prime is 1321560536291. The reversal of 1321560536255 is 5526350651231.

It is a cyclic number.

It is not a de Polignac number, because 1321560536255 - 2⁴ = 1321560536239 is a prime.

It is a congruent number.

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, 809789 + ... + 1816281.

It is an arithmetic number, because the mean of its divisors is an integer number (99552321540).

Almost surely, 2^{1321560536255} is an apocalyptic number.

1321560536255 is a deficient number, since it is larger than the sum of its proper divisors (271276608385).

1321560536255 is a wasteful number, since it uses less digits than its factorization.

1321560536255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007650.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 1321560536255 in words is "one trillion, three hundred twenty-one billion, five hundred sixty million, five hundred thirty-six thousand, two hundred fifty-five".