13645786545 has 12 divisors (see below), whose sum is σ = 23652696756. Its totient is φ = 7277752800.

The previous prime is 13645786523. The next prime is 13645786547. The reversal of 13645786545 is 54568754631.

It is a happy number.

13645786545 is a `hidden beast` number, since 1 + 3 + 6 + 4 + 578 + 65 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6087744576 + 7558041969 = 78024^2 + 86937^2 .

It is not a de Polignac number, because 13645786545 - 2⁵ = 13645786513 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13645786491 and 13645786500.

It is not an unprimeable number, because it can be changed into a prime (13645786547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151619806 + ... + 151619895.

It is an arithmetic number, because the mean of its divisors is an integer number (1971058063).

Almost surely, 2^13645786545 is an apocalyptic number.

13645786545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13645786545 is a deficient number, since it is larger than the sum of its proper divisors (10006910211).

13645786545 is a wasteful number, since it uses less digits than its factorization.

13645786545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303239712 (or 303239709 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 54.

The spelling of 13645786545 in words is "thirteen billion, six hundred forty-five million, seven hundred eighty-six thousand, five hundred forty-five".