3995661815 has 8 divisors (see below), whose sum is σ = 4795623888. Its totient is φ = 3195976320.

The previous prime is 3995661811. The next prime is 3995661841. The reversal of 3995661815 is 5181665993.

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

It is not a de Polignac number, because 3995661815 - 2² = 3995661811 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 (3995661811) 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, 35906 + ... + 96335.

It is an arithmetic number, because the mean of its divisors is an integer number (599452986).

Almost surely, 2^3995661815 is an apocalyptic number.

3995661815 is a deficient number, since it is larger than the sum of its proper divisors (799962073).

3995661815 is a wasteful number, since it uses less digits than its factorization.

3995661815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138289.

The product of its digits is 1749600, while the sum is 53.

The square root of 3995661815 is about 63211.2475355454. The cubic root of 3995661815 is about 1586.8269744276.

The spelling of 3995661815 in words is "three billion, nine hundred ninety-five million, six hundred sixty-one thousand, eight hundred fifteen".