12720658378453 has 4 divisors (see below), whose sum is σ = 13273730481888. Its totient is φ = 12167586275020.

The previous prime is 12720658378451. The next prime is 12720658378459. The reversal of 12720658378453 is 35487385602721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12720658378453 - 2¹ = 12720658378451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12720658378391 and 12720658378400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720658378451) 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 3 ways as a sum of consecutive naturals, for example, 276536051683 + ... + 276536051728.

It is an arithmetic number, because the mean of its divisors is an integer number (3318432620472).

Almost surely, 2^{12720658378453} is an apocalyptic number.

It is an amenable number.

12720658378453 is a deficient number, since it is larger than the sum of its proper divisors (553072103435).

12720658378453 is an equidigital number, since it uses as much as digits as its factorization.

12720658378453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553072103434.

The product of its (nonzero) digits is 67737600, while the sum is 61.

The spelling of 12720658378453 in words is "twelve trillion, seven hundred twenty billion, six hundred fifty-eight million, three hundred seventy-eight thousand, four hundred fifty-three".