3911996643 has 8 divisors (see below), whose sum is σ = 5356968528. Its totient is φ = 2537511264.

The previous prime is 3911996629. The next prime is 3911996657. The reversal of 3911996643 is 3466991193.

3911996643 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3911996629) and next prime (3911996657).

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

It is not a de Polignac number, because 3911996643 - 2⁵ = 3911996611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3911996243) 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, 17621496 + ... + 17621717.

It is an arithmetic number, because the mean of its divisors is an integer number (669621066).

Almost surely, 2^3911996643 is an apocalyptic number.

3911996643 is a deficient number, since it is larger than the sum of its proper divisors (1444971885).

3911996643 is a wasteful number, since it uses less digits than its factorization.

3911996643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35243253.

The product of its digits is 944784, while the sum is 51.

The square root of 3911996643 is about 62545.9562481860. The cubic root of 3911996643 is about 1575.6732343817.

The spelling of 3911996643 in words is "three billion, nine hundred eleven million, nine hundred ninety-six thousand, six hundred forty-three".