12278642530 has 64 divisors (see below), whose sum is σ = 29176111872. Its totient is φ = 3601981440.

The previous prime is 12278642527. The next prime is 12278642531. The reversal of 12278642530 is 3524687221.

It is not an unprimeable number, because it can be changed into a prime (12278642531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 455919 + ... + 482098.

It is an arithmetic number, because the mean of its divisors is an integer number (455876748).

Almost surely, 2^12278642530 is an apocalyptic number.

12278642530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12278642530 is an abundant number, since it is smaller than the sum of its proper divisors (16897469342).

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

12278642530 is a wasteful number, since it uses less digits than its factorization.

12278642530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938059.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 12278642530 in words is "twelve billion, two hundred seventy-eight million, six hundred forty-two thousand, five hundred thirty".