1866855535005 has 8 divisors (see below), whose sum is σ = 2986968856032. Its totient is φ = 995656285328.

The previous prime is 1866855535003. The next prime is 1866855535009. The reversal of 1866855535005 is 5005355586681.

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

It is a cyclic number.

It is not a de Polignac number, because 1866855535005 - 2¹ = 1866855535003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866855535003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62228517819 + ... + 62228517848.

It is an arithmetic number, because the mean of its divisors is an integer number (373371107004).

Almost surely, 2^{1866855535005} is an apocalyptic number.

1866855535005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1866855535005 is a deficient number, since it is larger than the sum of its proper divisors (1120113321027).

1866855535005 is a wasteful number, since it uses less digits than its factorization.

1866855535005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124457035675.

The product of its (nonzero) digits is 21600000, while the sum is 57.

The spelling of 1866855535005 in words is "one trillion, eight hundred sixty-six billion, eight hundred fifty-five million, five hundred thirty-five thousand, five".