12515247840 has 96 divisors (see below), whose sum is σ = 39441862656. Its totient is φ = 3335805440.

The previous prime is 12515247839. The next prime is 12515247847. The reversal of 12515247840 is 4874251521.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515247847) 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, 1273345 + ... + 1283135.

It is an arithmetic number, because the mean of its divisors is an integer number (410852736).

Almost surely, 2^12515247840 is an apocalyptic number.

12515247840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12515247840 is an abundant number, since it is smaller than the sum of its proper divisors (26926614816).

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

12515247840 is a wasteful number, since it uses less digits than its factorization.

12515247840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12472 (or 12464 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The spelling of 12515247840 in words is "twelve billion, five hundred fifteen million, two hundred forty-seven thousand, eight hundred forty".