13661512054245 has 224 divisors, whose sum is σ = 26970693120000. Its totient is φ = 6585165475200.

The previous prime is 13661512054243. The next prime is 13661512054279. The reversal of 13661512054245 is 54245021516631.

13661512054245 is a `hidden beast` number, since 1 + 3 + 6 + 6 + 15 + 1 + 205 + 424 + 5 = 666.

It is not a de Polignac number, because 13661512054245 - 2¹ = 13661512054243 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 13661512054245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661512054243) 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 223 ways as a sum of consecutive naturals, for example, 6508580206 + ... + 6508582304.

It is an arithmetic number, because the mean of its divisors is an integer number (120404880000).

Almost surely, 2^{13661512054245} is an apocalyptic number.

13661512054245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13661512054245 is a deficient number, since it is larger than the sum of its proper divisors (13309181065755).

13661512054245 is a wasteful number, since it uses less digits than its factorization.

13661512054245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 13661512054245 in words is "thirteen trillion, six hundred sixty-one billion, five hundred twelve million, fifty-four thousand, two hundred forty-five".