12278697984 has 520 divisors, whose sum is σ = 44528635008. Its totient is φ = 3291217920.

The previous prime is 12278697953. The next prime is 12278698057. The reversal of 12278697984 is 48979687221.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 39481189 + ... + 39481499.

Almost surely, 2^12278697984 is an apocalyptic number.

12278697984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12278697984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22264317504).

12278697984 is an abundant number, since it is smaller than the sum of its proper divisors (32249937024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12278697984 is an equidigital number, since it uses as much as digits as its factorization.

12278697984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 340 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The spelling of 12278697984 in words is "twelve billion, two hundred seventy-eight million, six hundred ninety-seven thousand, nine hundred eighty-four".