12758230638 has 24 divisors (see below), whose sum is σ = 27646585200. Its totient is φ = 4252166304.

The previous prime is 12758230633. The next prime is 12758230657. The reversal of 12758230638 is 83603285721.

12758230638 is a `hidden beast` number, since 1 + 2 + 7 + 5 + 8 + 2 + 3 + 0 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 12758230593 and 12758230602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12758230633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100618 + ... + 188786.

It is an arithmetic number, because the mean of its divisors is an integer number (1151941050).

Almost surely, 2^12758230638 is an apocalyptic number.

12758230638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12758230638 is an abundant number, since it is smaller than the sum of its proper divisors (14888354562).

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

12758230638 is a wasteful number, since it uses less digits than its factorization.

12758230638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96216 (or 96213 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 12758230638 in words is "twelve billion, seven hundred fifty-eight million, two hundred thirty thousand, six hundred thirty-eight".