12761620489 has 4 divisors (see below), whose sum is σ = 12763026324. Its totient is φ = 12760214656.

The previous prime is 12761620477. The next prime is 12761620513. The reversal of 12761620489 is 98402616721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6566671225 + 6194949264 = 81035^2 + 78708^2 .

It is a cyclic number.

It is not a de Polignac number, because 12761620489 - 2⁹ = 12761619977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12761620439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689212 + ... + 707485.

It is an arithmetic number, because the mean of its divisors is an integer number (3190756581).

Almost surely, 2^12761620489 is an apocalyptic number.

It is an amenable number.

12761620489 is a deficient number, since it is larger than the sum of its proper divisors (1405835).

12761620489 is an equidigital number, since it uses as much as digits as its factorization.

12761620489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405834.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 12761620489 in words is "twelve billion, seven hundred sixty-one million, six hundred twenty thousand, four hundred eighty-nine".