1323266672551 has 16 divisors (see below), whose sum is σ = 1366071940800. Its totient is φ = 1280847506688.

The previous prime is 1323266672447. The next prime is 1323266672557. The reversal of 1323266672551 is 1552766623231.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1323266672551 - 2³⁷ = 1185827719079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323266672495 and 1323266672504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323266672557) 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, 6061270 + ... + 6275788.

It is an arithmetic number, because the mean of its divisors is an integer number (85379496300).

Almost surely, 2^{1323266672551} is an apocalyptic number.

1323266672551 is a deficient number, since it is larger than the sum of its proper divisors (42805268249).

1323266672551 is a wasteful number, since it uses less digits than its factorization.

1323266672551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215418.

The product of its digits is 2721600, while the sum is 49.

The spelling of 1323266672551 in words is "one trillion, three hundred twenty-three billion, two hundred sixty-six million, six hundred seventy-two thousand, five hundred fifty-one".