12545212440 has 32 divisors (see below), whose sum is σ = 37635637680. Its totient is φ = 3345389952.

The previous prime is 12545212429. The next prime is 12545212451. The reversal of 12545212440 is 4421254521.

It is an interprime number because it is at equal distance from previous prime (12545212429) and next prime (12545212451).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12545212398 and 12545212407.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52271599 + ... + 52271838.

Almost surely, 2^12545212440 is an apocalyptic number.

12545212440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12545212440 is an abundant number, since it is smaller than the sum of its proper divisors (25090425240).

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

12545212440 is a wasteful number, since it uses less digits than its factorization.

12545212440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104543451 (or 104543447 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 12545212440 its reverse (4421254521), we get a palindrome (16966466961).

The spelling of 12545212440 in words is "twelve billion, five hundred forty-five million, two hundred twelve thousand, four hundred forty".