12720164108761 has 8 divisors (see below), whose sum is σ = 12724087132800. Its totient is φ = 12716241328752.

The previous prime is 12720164108749. The next prime is 12720164108779. The reversal of 12720164108761 is 16780146102721.

It is a happy number.

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 12720164108761 - 2³⁷ = 12582725155289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12720164108261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203331915 + ... + 203394463.

It is an arithmetic number, because the mean of its divisors is an integer number (1590510891600).

Almost surely, 2^{12720164108761} is an apocalyptic number.

It is an amenable number.

12720164108761 is a deficient number, since it is larger than the sum of its proper divisors (3923024039).

12720164108761 is an equidigital number, since it uses as much as digits as its factorization.

12720164108761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122015.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 12720164108761 in words is "twelve trillion, seven hundred twenty billion, one hundred sixty-four million, one hundred eight thousand, seven hundred sixty-one".