12734623081 has 4 divisors (see below), whose sum is σ = 12820090500. Its totient is φ = 12649155664.

The previous prime is 12734622949. The next prime is 12734623091. The reversal of 12734623081 is 18032643721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18032643721 = 643 ⋅28044547.

It can be written as a sum of positive squares in 2 ways, for example, as 2853269056 + 9881354025 = 53416^2 + 99405^2 .

It is a cyclic number.

It is not a de Polignac number, because 12734623081 - 2¹⁷ = 12734492009 is a prime.

It is a super-2 number, since 2×12734623081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12734623081.

It is not an unprimeable number, because it can be changed into a prime (12734623091) 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, 42733486 + ... + 42733783.

It is an arithmetic number, because the mean of its divisors is an integer number (3205022625).

Almost surely, 2^12734623081 is an apocalyptic number.

It is an amenable number.

12734623081 is a deficient number, since it is larger than the sum of its proper divisors (85467419).

12734623081 is an equidigital number, since it uses as much as digits as its factorization.

12734623081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85467418.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 12734623081 in words is "twelve billion, seven hundred thirty-four million, six hundred twenty-three thousand, eighty-one".