12515442040 has 16 divisors (see below), whose sum is σ = 28159744680. Its totient is φ = 5006176800.

The previous prime is 12515441969. The next prime is 12515442059. The reversal of 12515442040 is 4024451521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156442986 + ... + 156443065.

Almost surely, 2^12515442040 is an apocalyptic number.

12515442040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12515442040 is an abundant number, since it is smaller than the sum of its proper divisors (15644302640).

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

12515442040 is a wasteful number, since it uses less digits than its factorization.

12515442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312886062 (or 312886058 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 12515442040 its reverse (4024451521), we get a palindrome (16539893561).

The spelling of 12515442040 in words is "twelve billion, five hundred fifteen million, four hundred forty-two thousand, forty".