1285855744813 has 16 divisors (see below), whose sum is σ = 1303484529600. Its totient is φ = 1268373375360.

The previous prime is 1285855744783. The next prime is 1285855744829. The reversal of 1285855744813 is 3184475585821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1285855744813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285855744883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15158923 + ... + 15243511.

It is an arithmetic number, because the mean of its divisors is an integer number (81467783100).

Almost surely, 2^{1285855744813} is an apocalyptic number.

It is an amenable number.

1285855744813 is a deficient number, since it is larger than the sum of its proper divisors (17628784787).

1285855744813 is a wasteful number, since it uses less digits than its factorization.

1285855744813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85452.

The product of its digits is 43008000, while the sum is 61.

The spelling of 1285855744813 in words is "one trillion, two hundred eighty-five billion, eight hundred fifty-five million, seven hundred forty-four thousand, eight hundred thirteen".