12634541980 has 48 divisors (see below), whose sum is σ = 26742804480. Its totient is φ = 5013885248.

The previous prime is 12634541971. The next prime is 12634541987. The reversal of 12634541980 is 8914543621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12634541987) 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 15 ways as a sum of consecutive naturals, for example, 1877061 + ... + 1883779.

It is an arithmetic number, because the mean of its divisors is an integer number (557141760).

Almost surely, 2^12634541980 is an apocalyptic number.

12634541980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12634541980 is an abundant number, since it is smaller than the sum of its proper divisors (14108262500).

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

12634541980 is a wasteful number, since it uses less digits than its factorization.

12634541980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458 (or 7456 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 12634541980 in words is "twelve billion, six hundred thirty-four million, five hundred forty-one thousand, nine hundred eighty".