12534031640 has 32 divisors (see below), whose sum is σ = 30370924080. Its totient is φ = 4627949952.

The previous prime is 12534031619. The next prime is 12534031673. The reversal of 12534031640 is 4613043521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12051434 + ... + 12052473.

Almost surely, 2^12534031640 is an apocalyptic number.

12534031640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12534031640 is an abundant number, since it is smaller than the sum of its proper divisors (17836892440).

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

12534031640 is a wasteful number, since it uses less digits than its factorization.

12534031640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24103931 (or 24103927 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 12534031640 in words is "twelve billion, five hundred thirty-four million, thirty-one thousand, six hundred forty".