12381915402 has 96 divisors (see below), whose sum is σ = 28531077120. Its totient is φ = 3869938080.

The previous prime is 12381915397. The next prime is 12381915409. The reversal of 12381915402 is 20451918321.

12381915402 is a `hidden beast` number, since 1 + 23 + 8 + 1 + 91 + 540 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (12381915409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24615883 + ... + 24616385.

It is an arithmetic number, because the mean of its divisors is an integer number (297198720).

Almost surely, 2^12381915402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12381915402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14265538560).

12381915402 is an abundant number, since it is smaller than the sum of its proper divisors (16149161718).

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

12381915402 is a wasteful number, since it uses less digits than its factorization.

12381915402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1125 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 12381915402 in words is "twelve billion, three hundred eighty-one million, nine hundred fifteen thousand, four hundred two".