1243678613185 has 8 divisors (see below), whose sum is σ = 1570962458880. Its totient is φ = 942577475184.

The previous prime is 1243678613159. The next prime is 1243678613213. The reversal of 1243678613185 is 5813168763421.

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-1243678613185 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6545676817 + ... + 6545677006.

It is an arithmetic number, because the mean of its divisors is an integer number (196370307360).

Almost surely, 2^{1243678613185} is an apocalyptic number.

It is an amenable number.

1243678613185 is a deficient number, since it is larger than the sum of its proper divisors (327283845695).

1243678613185 is a wasteful number, since it uses less digits than its factorization.

1243678613185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13091353847.

The product of its digits is 5806080, while the sum is 55.

The spelling of 1243678613185 in words is "one trillion, two hundred forty-three billion, six hundred seventy-eight million, six hundred thirteen thousand, one hundred eighty-five".