6291681393 has 8 divisors (see below), whose sum is σ = 8431492608. Its totient is φ = 4173162224.

The previous prime is 6291681377. The next prime is 6291681437. The reversal of 6291681393 is 3931861926.

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 6291681393 - 2⁴ = 6291681377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6291681343) 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, 5322321 + ... + 5323502.

It is an arithmetic number, because the mean of its divisors is an integer number (1053936576).

Almost surely, 2^6291681393 is an apocalyptic number.

It is an amenable number.

6291681393 is a deficient number, since it is larger than the sum of its proper divisors (2139811215).

6291681393 is a wasteful number, since it uses less digits than its factorization.

6291681393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10646023.

The product of its digits is 419904, while the sum is 48.

The square root of 6291681393 is about 79320.1197238128. The cubic root of 6291681393 is about 1846.1014951511.

The spelling of 6291681393 in words is "six billion, two hundred ninety-one million, six hundred eighty-one thousand, three hundred ninety-three".