1321352544551 has 8 divisors (see below), whose sum is σ = 1425147848544. Its totient is φ = 1217864783520.

The previous prime is 1321352544541. The next prime is 1321352544637. The reversal of 1321352544551 is 1554452531231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321352544551 - 2³⁴ = 1304172675367 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321352544499 and 1321352544508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321352544511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76876811 + ... + 76893996.

It is an arithmetic number, because the mean of its divisors is an integer number (178143481068).

Almost surely, 2^{1321352544551} is an apocalyptic number.

1321352544551 is a deficient number, since it is larger than the sum of its proper divisors (103795303993).

1321352544551 is a wasteful number, since it uses less digits than its factorization.

1321352544551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153771481.

The product of its digits is 360000, while the sum is 41.

The spelling of 1321352544551 in words is "one trillion, three hundred twenty-one billion, three hundred fifty-two million, five hundred forty-four thousand, five hundred fifty-one".