12553518777 has 16 divisors (see below), whose sum is σ = 17727406272. Its totient is φ = 7874588160.

The previous prime is 12553518763. The next prime is 12553518787. The reversal of 12553518777 is 77781535521.

It is a happy number.

It is not a de Polignac number, because 12553518777 - 2⁶ = 12553518713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (12553518707) 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 15 ways as a sum of consecutive naturals, for example, 169173 + ... + 231789.

It is an arithmetic number, because the mean of its divisors is an integer number (1107962892).

Almost surely, 2^12553518777 is an apocalyptic number.

12553518777 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12553518777 is a deficient number, since it is larger than the sum of its proper divisors (5173887495).

12553518777 is a wasteful number, since it uses less digits than its factorization.

12553518777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66568.

The product of its digits is 2058000, while the sum is 51.

The spelling of 12553518777 in words is "twelve billion, five hundred fifty-three million, five hundred eighteen thousand, seven hundred seventy-seven".