1324645121261 has 48 divisors (see below), whose sum is σ = 1687555344384. Its totient is φ = 1017686208000.

The previous prime is 1324645121257. The next prime is 1324645121279. The reversal of 1324645121261 is 1621215464231.

It is not a de Polignac number, because 1324645121261 - 2² = 1324645121257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1324645121281) 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, 18244571 + ... + 18317031.

It is an arithmetic number, because the mean of its divisors is an integer number (35157403008).

Almost surely, 2^{1324645121261} is an apocalyptic number.

1324645121261 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1324645121261 is a deficient number, since it is larger than the sum of its proper divisors (362910223123).

1324645121261 is a wasteful number, since it uses less digits than its factorization.

1324645121261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72794 (or 72783 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The spelling of 1324645121261 in words is "one trillion, three hundred twenty-four billion, six hundred forty-five million, one hundred twenty-one thousand, two hundred sixty-one".