12278905371 has 16 divisors (see below), whose sum is σ = 18192949120. Its totient is φ = 8185046760.

The previous prime is 12278905349. The next prime is 12278905417. The reversal of 12278905371 is 17350987221.

12278905371 is a `hidden beast` number, since 1 + 2 + 27 + 8 + 90 + 537 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-12278905371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12278905271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311076 + ... + 348318.

It is an arithmetic number, because the mean of its divisors is an integer number (1137059320).

Almost surely, 2^12278905371 is an apocalyptic number.

12278905371 is a deficient number, since it is larger than the sum of its proper divisors (5914043749).

12278905371 is a wasteful number, since it uses less digits than its factorization.

12278905371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49463 (or 49457 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 12278905371 in words is "twelve billion, two hundred seventy-eight million, nine hundred five thousand, three hundred seventy-one".