12254478345 has 48 divisors (see below), whose sum is σ = 21467452032. Its totient is φ = 6466237440.

The previous prime is 12254478337. The next prime is 12254478359. The reversal of 12254478345 is 54387445221.

12254478345 is a `hidden beast` number, since 1 + 2 + 2 + 544 + 78 + 34 + 5 = 666.

It is not a de Polignac number, because 12254478345 - 2³ = 12254478337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12254478345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5887705 + ... + 5889785.

It is an arithmetic number, because the mean of its divisors is an integer number (447238584).

Almost surely, 2^12254478345 is an apocalyptic number.

12254478345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12254478345 is a deficient number, since it is larger than the sum of its proper divisors (9212973687).

12254478345 is a wasteful number, since it uses less digits than its factorization.

12254478345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3419 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The spelling of 12254478345 in words is "twelve billion, two hundred fifty-four million, four hundred seventy-eight thousand, three hundred forty-five".