13451126664661 has 4 divisors (see below), whose sum is σ = 15372716188192. Its totient is φ = 11529537141132.

The previous prime is 13451126664583. The next prime is 13451126664671. The reversal of 13451126664661 is 16646662115431.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13451126664661 - 2⁷ = 13451126664533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13451126664599 and 13451126664608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13451126664671) 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, 960794761755 + ... + 960794761768.

It is an arithmetic number, because the mean of its divisors is an integer number (3843179047048).

Almost surely, 2^{13451126664661} is an apocalyptic number.

It is an amenable number.

13451126664661 is a deficient number, since it is larger than the sum of its proper divisors (1921589523531).

13451126664661 is an equidigital number, since it uses as much as digits as its factorization.

13451126664661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921589523530.

The product of its digits is 3732480, while the sum is 52.

The spelling of 13451126664661 in words is "thirteen trillion, four hundred fifty-one billion, one hundred twenty-six million, six hundred sixty-four thousand, six hundred sixty-one".