3815215816 has 16 divisors (see below), whose sum is σ = 7197418800. Its totient is φ = 1895904144.

The previous prime is 3815215801. The next prime is 3815215819. The reversal of 3815215816 is 6185125183.

It is a happy number.

3815215816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3815215819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1461586 + ... + 1464193.

It is an arithmetic number, because the mean of its divisors is an integer number (449838675).

Almost surely, 2^3815215816 is an apocalyptic number.

It is an amenable number.

3815215816 is a deficient number, since it is larger than the sum of its proper divisors (3382202984).

3815215816 is a wasteful number, since it uses less digits than its factorization.

3815215816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2925948 (or 2925944 counting only the distinct ones).

The product of its digits is 57600, while the sum is 40.

The square root of 3815215816 is about 61767.4332961958. The cubic root of 3815215816 is about 1562.5707962034.

The spelling of 3815215816 in words is "three billion, eight hundred fifteen million, two hundred fifteen thousand, eight hundred sixteen".