6474947991 has 8 divisors (see below), whose sum is σ = 8638865280. Its totient is φ = 4313831352.

The previous prime is 6474947989. The next prime is 6474948113. The reversal of 6474947991 is 1997494746.

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

It is not a de Polignac number, because 6474947991 - 2¹ = 6474947989 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6474947951) 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, 694761 + ... + 704018.

It is an arithmetic number, because the mean of its divisors is an integer number (1079858160).

Almost surely, 2^6474947991 is an apocalyptic number.

6474947991 is a deficient number, since it is larger than the sum of its proper divisors (2163917289).

6474947991 is a wasteful number, since it uses less digits than its factorization.

6474947991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400325.

The product of its digits is 13716864, while the sum is 60.

The square root of 6474947991 is about 80467.0615283049. The cubic root of 6474947991 is about 1863.8548786389.

The spelling of 6474947991 in words is "six billion, four hundred seventy-four million, nine hundred forty-seven thousand, nine hundred ninety-one".