1323256651361 has 16 divisors (see below), whose sum is σ = 1373843865600. Its totient is φ = 1273166110800.

The previous prime is 1323256651349. The next prime is 1323256651363. The reversal of 1323256651361 is 1631566523231.

It is a cyclic number.

It is not a de Polignac number, because 1323256651361 - 2¹⁰ = 1323256650337 is a prime.

It is a super-2 number, since 2×1323256651361² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1323256651363) 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, 32113670 + ... + 32154848.

It is an arithmetic number, because the mean of its divisors is an integer number (85865241600).

Almost surely, 2^{1323256651361} is an apocalyptic number.

It is an amenable number.

1323256651361 is a deficient number, since it is larger than the sum of its proper divisors (50587214239).

1323256651361 is a wasteful number, since it uses less digits than its factorization.

1323256651361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47180.

The product of its digits is 583200, while the sum is 44.

The spelling of 1323256651361 in words is "one trillion, three hundred twenty-three billion, two hundred fifty-six million, six hundred fifty-one thousand, three hundred sixty-one".