12478375551 has 4 divisors (see below), whose sum is σ = 16637834072. Its totient is φ = 8318917032.

The previous prime is 12478375517. The next prime is 12478375601. The reversal of 12478375551 is 15557387421.

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

It is not a de Polignac number, because 12478375551 - 2¹¹ = 12478373503 is a prime.

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 12478375551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12478370551) 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, 2079729256 + ... + 2079729261.

It is an arithmetic number, because the mean of its divisors is an integer number (4159458518).

Almost surely, 2^12478375551 is an apocalyptic number.

12478375551 is a deficient number, since it is larger than the sum of its proper divisors (4159458521).

12478375551 is an equidigital number, since it uses as much as digits as its factorization.

12478375551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159458520.

The product of its digits is 1176000, while the sum is 48.

The spelling of 12478375551 in words is "twelve billion, four hundred seventy-eight million, three hundred seventy-five thousand, five hundred fifty-one".