3815785347815 has 16 divisors (see below), whose sum is σ = 5233440368640. Its totient is φ = 2616356864160.

The previous prime is 3815785347809. The next prime is 3815785347817. The reversal of 3815785347815 is 5187435875183.

It is not a de Polignac number, because 3815785347815 - 2¹² = 3815785343719 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3815785347817) 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, 3272285 + ... + 4282454.

It is an arithmetic number, because the mean of its divisors is an integer number (327090023040).

Almost surely, 2^{3815785347815} is an apocalyptic number.

3815785347815 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3815785347815 is a deficient number, since it is larger than the sum of its proper divisors (1417655020825).

3815785347815 is a wasteful number, since it uses less digits than its factorization.

3815785347815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569182.

The product of its digits is 112896000, while the sum is 65.

The spelling of 3815785347815 in words is "three trillion, eight hundred fifteen billion, seven hundred eighty-five million, three hundred forty-seven thousand, eight hundred fifteen".