12611372731 has 4 divisors (see below), whose sum is σ = 12611979000. Its totient is φ = 12610766464.

The previous prime is 12611372689. The next prime is 12611372747. The reversal of 12611372731 is 13727311621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13727311621 = 1093 ⋅12559297.

It is a cyclic number.

It is not a de Polignac number, because 12611372731 - 2⁷ = 12611372603 is a prime.

It is a super-3 number, since 3×12611372731³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12611372771) 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, 270781 + ... + 313918.

It is an arithmetic number, because the mean of its divisors is an integer number (3152994750).

Almost surely, 2^12611372731 is an apocalyptic number.

12611372731 is a deficient number, since it is larger than the sum of its proper divisors (606269).

12611372731 is an equidigital number, since it uses as much as digits as its factorization.

12611372731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606268.

The product of its digits is 10584, while the sum is 34.

The spelling of 12611372731 in words is "twelve billion, six hundred eleven million, three hundred seventy-two thousand, seven hundred thirty-one".