12654420517 has 4 divisors (see below), whose sum is σ = 12655284876. Its totient is φ = 12653556160.

The previous prime is 12654420511. The next prime is 12654420551. The reversal of 12654420517 is 71502445621.

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 12117386241 + 537034276 = 110079^2 + 23174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12654420517 is a prime.

It is a super-3 number, since 3×12654420517³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12654420511) 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, 409834 + ... + 439627.

It is an arithmetic number, because the mean of its divisors is an integer number (3163821219).

Almost surely, 2^12654420517 is an apocalyptic number.

It is an amenable number.

12654420517 is a deficient number, since it is larger than the sum of its proper divisors (864359).

12654420517 is an equidigital number, since it uses as much as digits as its factorization.

12654420517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864358.

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 12654420517 in words is "twelve billion, six hundred fifty-four million, four hundred twenty thousand, five hundred seventeen".