3968626815 has 24 divisors (see below), whose sum is σ = 6916972608. Its totient is φ = 2104902720.

The previous prime is 3968626811. The next prime is 3968626817. The reversal of 3968626815 is 5186268693.

It is a happy number.

3968626815 is a `hidden beast` number, since 3 + 9 + 6 + 8 + 626 + 8 + 1 + 5 = 666.

It is not a de Polignac number, because 3968626815 - 2² = 3968626811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3968626811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 235479 + ... + 251768.

It is an arithmetic number, because the mean of its divisors is an integer number (288207192).

Almost surely, 2^3968626815 is an apocalyptic number.

3968626815 is a deficient number, since it is larger than the sum of its proper divisors (2948345793).

3968626815 is a wasteful number, since it uses less digits than its factorization.

3968626815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487439 (or 487436 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 3968626815 is about 62997.0381446620. The cubic root of 3968626815 is about 1583.2400019101.

The spelling of 3968626815 in words is "three billion, nine hundred sixty-eight million, six hundred twenty-six thousand, eight hundred fifteen".