12634153338378 has 128 divisors (see below), whose sum is σ = 31250897233920. Its totient is φ = 3347744359680.

The previous prime is 12634153338377. The next prime is 12634153338409. The reversal of 12634153338378 is 87383335143621.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (12634153338377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 252541875 + ... + 252591897.

It is an arithmetic number, because the mean of its divisors is an integer number (244147634640).

Almost surely, 2^{12634153338378} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12634153338378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15625448616960).

12634153338378 is an abundant number, since it is smaller than the sum of its proper divisors (18616743895542).

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

12634153338378 is a wasteful number, since it uses less digits than its factorization.

12634153338378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65564.

The product of its digits is 26127360, while the sum is 57.

The spelling of 12634153338378 in words is "twelve trillion, six hundred thirty-four billion, one hundred fifty-three million, three hundred thirty-eight thousand, three hundred seventy-eight".