12278381885 has 64 divisors (see below), whose sum is σ = 19040845824. Its totient is φ = 7376486400.

The previous prime is 12278381879. The next prime is 12278381933. The reversal of 12278381885 is 58818387221.

It is not a de Polignac number, because 12278381885 - 2³⁰ = 11204640061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3065294 + ... + 3069296.

It is an arithmetic number, because the mean of its divisors is an integer number (297513216).

Almost surely, 2^12278381885 is an apocalyptic number.

It is an amenable number.

12278381885 is a deficient number, since it is larger than the sum of its proper divisors (6762463939).

12278381885 is a wasteful number, since it uses less digits than its factorization.

12278381885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314.

The product of its digits is 1720320, while the sum is 53.

The spelling of 12278381885 in words is "twelve billion, two hundred seventy-eight million, three hundred eighty-one thousand, eight hundred eighty-five".