12778698240 has 960 divisors, whose sum is σ = 57769873920. Its totient is φ = 2655313920.

The previous prime is 12778698223. The next prime is 12778698287. The reversal of 12778698240 is 4289687721.

It is a happy number.

12778698240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1161699835 + ... + 1161699845.

It is an arithmetic number, because the mean of its divisors is an integer number (60176952).

Almost surely, 2^12778698240 is an apocalyptic number.

12778698240 is a gapful number since it is divisible by the number (10) 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 12778698240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28884936960).

12778698240 is an abundant number, since it is smaller than the sum of its proper divisors (44991175680).

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

12778698240 is an frugal number, since it uses more digits than its factorization.

12778698240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The spelling of 12778698240 in words is "twelve billion, seven hundred seventy-eight million, six hundred ninety-eight thousand, two hundred forty".