12548359978 has 16 divisors (see below), whose sum is σ = 23467063104. Its totient is φ = 4888971360.

The previous prime is 12548359951. The next prime is 12548359979. The reversal of 12548359978 is 87995384521.

It is a super-2 number, since 2×12548359978² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12548359979) 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 7 ways as a sum of consecutive naturals, for example, 40741275 + ... + 40741582.

It is an arithmetic number, because the mean of its divisors is an integer number (1466691444).

Almost surely, 2^12548359978 is an apocalyptic number.

12548359978 is a deficient number, since it is larger than the sum of its proper divisors (10918703126).

12548359978 is a wasteful number, since it uses less digits than its factorization.

12548359978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81482877.

The product of its digits is 21772800, while the sum is 61.

The spelling of 12548359978 in words is "twelve billion, five hundred forty-eight million, three hundred fifty-nine thousand, nine hundred seventy-eight".