13566628451 has 4 divisors (see below), whose sum is σ = 13625871600. Its totient is φ = 13507385304.

The previous prime is 13566628423. The next prime is 13566628511. The reversal of 13566628451 is 15482666531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15482666531 = 277 ⋅55894103.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13566628451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13566628396 and 13566628405.

It is not an unprimeable number, because it can be changed into a prime (13566628351) 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, 29621231 + ... + 29621688.

It is an arithmetic number, because the mean of its divisors is an integer number (3406467900).

Almost surely, 2^13566628451 is an apocalyptic number.

13566628451 is a deficient number, since it is larger than the sum of its proper divisors (59243149).

13566628451 is an equidigital number, since it uses as much as digits as its factorization.

13566628451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59243148.

The product of its digits is 1036800, while the sum is 47.

The spelling of 13566628451 in words is "thirteen billion, five hundred sixty-six million, six hundred twenty-eight thousand, four hundred fifty-one".