12533777645 has 8 divisors (see below), whose sum is σ = 15042661656. Its totient is φ = 10025603136.

The previous prime is 12533777623. The next prime is 12533777653. The reversal of 12533777645 is 54677733521.

12533777645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 977312644 + 11556465001 = 31262^2 + 107501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12533777645 is a prime.

It is a super-3 number, since 3×12533777645³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12533777593 and 12533777602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137702 + ... + 209831.

It is an arithmetic number, because the mean of its divisors is an integer number (1880332707).

Almost surely, 2^12533777645 is an apocalyptic number.

It is an amenable number.

12533777645 is a deficient number, since it is larger than the sum of its proper divisors (2508884011).

12533777645 is an equidigital number, since it uses as much as digits as its factorization.

12533777645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354751.

The product of its digits is 3704400, while the sum is 50.

The spelling of 12533777645 in words is "twelve billion, five hundred thirty-three million, seven hundred seventy-seven thousand, six hundred forty-five".