1326065553261 has 48 divisors (see below), whose sum is σ = 1953652107264. Its totient is φ = 866540439072.

The previous prime is 1326065553227. The next prime is 1326065553299. The reversal of 1326065553261 is 1623555606231.

1326065553261 is a `hidden beast` number, since 1 + 3 + 2 + 6 + 0 + 6 + 55 + 532 + 61 = 666.

It is not a de Polignac number, because 1326065553261 - 2¹⁴ = 1326065536877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326065553961) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153351240 + ... + 153359886.

It is an arithmetic number, because the mean of its divisors is an integer number (40701085568).

Almost surely, 2^{1326065553261} is an apocalyptic number.

It is an amenable number.

1326065553261 is a deficient number, since it is larger than the sum of its proper divisors (627586554003).

1326065553261 is a wasteful number, since it uses less digits than its factorization.

1326065553261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9950 (or 9947 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 45.

The spelling of 1326065553261 in words is "one trillion, three hundred twenty-six billion, sixty-five million, five hundred fifty-three thousand, two hundred sixty-one".