6635985038885 has 4 divisors (see below), whose sum is σ = 7963182046668. Its totient is φ = 5308788031104.

The previous prime is 6635985038849. The next prime is 6635985038951. The reversal of 6635985038885 is 5888305895366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4864322881441 + 1771662157444 = 2205521^2 + 1331038^2 .

It is a cyclic number.

It is not a de Polignac number, because 6635985038885 - 2⁸ = 6635985038629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 663598503884 + ... + 663598503893.

It is an arithmetic number, because the mean of its divisors is an integer number (1990795511667).

Almost surely, 2^{6635985038885} is an apocalyptic number.

It is an amenable number.

6635985038885 is a deficient number, since it is larger than the sum of its proper divisors (1327197007783).

6635985038885 is a wasteful number, since it uses less digits than its factorization.

6635985038885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327197007782.

The product of its (nonzero) digits is 1492992000, while the sum is 74.

The spelling of 6635985038885 in words is "six trillion, six hundred thirty-five billion, nine hundred eighty-five million, thirty-eight thousand, eight hundred eighty-five".