12777335145 has 32 divisors (see below), whose sum is σ = 22720083840. Its totient is φ = 6813132480.

The previous prime is 12777335143. The next prime is 12777335159. The reversal of 12777335145 is 54153377721.

12777335145 is a `hidden beast` number, since 1 + 277 + 7 + 335 + 1 + 45 = 666.

It is not a de Polignac number, because 12777335145 - 2¹ = 12777335143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 12777335145.

It is not an unprimeable number, because it can be changed into a prime (12777335143) 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 31 ways as a sum of consecutive naturals, for example, 1012575 + ... + 1025115.

It is an arithmetic number, because the mean of its divisors is an integer number (710002620).

Almost surely, 2^12777335145 is an apocalyptic number.

12777335145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12777335145 is a deficient number, since it is larger than the sum of its proper divisors (9942748695).

12777335145 is a wasteful number, since it uses less digits than its factorization.

12777335145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20102 (or 20096 counting only the distinct ones).

The product of its digits is 617400, while the sum is 45.

The spelling of 12777335145 in words is "twelve billion, seven hundred seventy-seven million, three hundred thirty-five thousand, one hundred forty-five".