3511681320685 has 8 divisors (see below), whose sum is σ = 4216106847096. Its totient is φ = 2807952215040.

The previous prime is 3511681320671. The next prime is 3511681320713. The reversal of 3511681320685 is 5860231861153.

It can be written as a sum of positive squares in 4 ways, for example, as 1132566336841 + 2379114983844 = 1064221^2 + 1542438^2 .

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

It is not a de Polignac number, because 3511681320685 - 2¹⁷ = 3511681189613 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 7 ways as a sum of consecutive naturals, for example, 174094096 + ... + 174114265.

It is an arithmetic number, because the mean of its divisors is an integer number (527013355887).

Almost surely, 2^{3511681320685} is an apocalyptic number.

It is an amenable number.

3511681320685 is a deficient number, since it is larger than the sum of its proper divisors (704425526411).

3511681320685 is a wasteful number, since it uses less digits than its factorization.

3511681320685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348210383.

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 3511681320685 in words is "three trillion, five hundred eleven billion, six hundred eighty-one million, three hundred twenty thousand, six hundred eighty-five".