3961623505 has 8 divisors (see below), whose sum is σ = 5433083712. Its totient is φ = 2716541808.

The previous prime is 3961623461. The next prime is 3961623511. The reversal of 3961623505 is 5053261693.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3961623505 - 2⁹ = 3961622993 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56594587 + ... + 56594656.

It is an arithmetic number, because the mean of its divisors is an integer number (679135464).

Almost surely, 2^3961623505 is an apocalyptic number.

3961623505 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3961623505 is a deficient number, since it is larger than the sum of its proper divisors (1471460207).

3961623505 is a wasteful number, since it uses less digits than its factorization.

3961623505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113189255.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 3961623505 is about 62941.4291623570. The cubic root of 3961623505 is about 1582.3081557389.

The spelling of 3961623505 in words is "three billion, nine hundred sixty-one million, six hundred twenty-three thousand, five hundred five".