3815718642 has 12 divisors (see below), whose sum is σ = 8267390430. Its totient is φ = 1271906208.

The previous prime is 3815718617. The next prime is 3815718677. The reversal of 3815718642 is 2468175183.

3815718642 is a `hidden beast` number, since 38 + 1 + 571 + 8 + 6 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2392090281 + 1423628361 = 48909^2 + 37731^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105992167 + ... + 105992202.

Almost surely, 2^3815718642 is an apocalyptic number.

3815718642 is an abundant number, since it is smaller than the sum of its proper divisors (4451671788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3815718642 is a wasteful number, since it uses less digits than its factorization.

3815718642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211984377 (or 211984374 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 3815718642 is about 61771.5034785458. The cubic root of 3815718642 is about 1562.6394394769.

The spelling of 3815718642 in words is "three billion, eight hundred fifteen million, seven hundred eighteen thousand, six hundred forty-two".