12652209978540 has 96 divisors (see below), whose sum is σ = 38812616833536. Its totient is φ = 3054038423040.

The previous prime is 12652209978539. The next prime is 12652209978547. The reversal of 12652209978540 is 4587990225621.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (12652209978547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40983592 + ... + 41291151.

It is an arithmetic number, because the mean of its divisors is an integer number (404298092016).

Almost surely, 2^{12652209978540} is an apocalyptic number.

12652209978540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12652209978540 is an abundant number, since it is smaller than the sum of its proper divisors (26160406854996).

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

12652209978540 is a wasteful number, since it uses less digits than its factorization.

12652209978540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82274999 (or 82274997 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 60.

The spelling of 12652209978540 in words is "twelve trillion, six hundred fifty-two billion, two hundred nine million, nine hundred seventy-eight thousand, five hundred forty".