12664054551 has 4 divisors (see below), whose sum is σ = 16885406072. Its totient is φ = 8442703032.

The previous prime is 12664054549. The next prime is 12664054567. The reversal of 12664054551 is 15545046621.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12664054551 - 2¹ = 12664054549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664050551) 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, 2110675756 + ... + 2110675761.

It is an arithmetic number, because the mean of its divisors is an integer number (4221351518).

Almost surely, 2^12664054551 is an apocalyptic number.

12664054551 is a deficient number, since it is larger than the sum of its proper divisors (4221351521).

12664054551 is an equidigital number, since it uses as much as digits as its factorization.

12664054551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221351520.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 12664054551 in words is "twelve billion, six hundred sixty-four million, fifty-four thousand, five hundred fifty-one".