3518740835821 has 8 divisors (see below), whose sum is σ = 3533913089784. Its totient is φ = 3503573306880.

The previous prime is 3518740835791. The next prime is 3518740835837. The reversal of 3518740835821 is 1285380478153.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 137132458596 + 3381608377225 = 370314^2 + 1838915^2 .

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 3518740835821 - 2⁵ = 3518740835789 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 (3518740835851) 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, 315441 + ... + 2671513.

It is an arithmetic number, because the mean of its divisors is an integer number (441739136223).

Almost surely, 2^{3518740835821} is an apocalyptic number.

It is an amenable number.

3518740835821 is a deficient number, since it is larger than the sum of its proper divisors (15172253963).

3518740835821 is a wasteful number, since it uses less digits than its factorization.

3518740835821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362511.

The product of its (nonzero) digits is 6451200, while the sum is 55.

The spelling of 3518740835821 in words is "three trillion, five hundred eighteen billion, seven hundred forty million, eight hundred thirty-five thousand, eight hundred twenty-one".