12748619550 has 48 divisors (see below), whose sum is σ = 31624248240. Its totient is φ = 3398807040.

The previous prime is 12748619519. The next prime is 12748619557. The reversal of 12748619550 is 5591684721.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12748619550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12748619557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 846486 + ... + 861414.

It is an arithmetic number, because the mean of its divisors is an integer number (658838505).

Almost surely, 2^12748619550 is an apocalyptic number.

12748619550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12748619550 is an abundant number, since it is smaller than the sum of its proper divisors (18875628690).

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

12748619550 is a wasteful number, since it uses less digits than its factorization.

12748619550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20637 (or 20632 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 48.

The spelling of 12748619550 in words is "twelve billion, seven hundred forty-eight million, six hundred nineteen thousand, five hundred fifty".