3948409063991 has 8 divisors (see below), whose sum is σ = 4513237988640. Its totient is φ = 3383772761088.

The previous prime is 3948409063943. The next prime is 3948409063997. The reversal of 3948409063991 is 1993609048493.

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 3948409063991 - 2¹⁸ = 3948408801847 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 (3948409063997) 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, 48111506 + ... + 48193503.

It is an arithmetic number, because the mean of its divisors is an integer number (564154748580).

Almost surely, 2^{3948409063991} is an apocalyptic number.

3948409063991 is a deficient number, since it is larger than the sum of its proper divisors (564828924649).

3948409063991 is an equidigital number, since it uses as much as digits as its factorization.

3948409063991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96310873.

The product of its (nonzero) digits is 45349632, while the sum is 65.

The spelling of 3948409063991 in words is "three trillion, nine hundred forty-eight billion, four hundred nine million, sixty-three thousand, nine hundred ninety-one".