6491083905 has 64 divisors (see below), whose sum is σ = 12861676800. Its totient is φ = 3086760960.

The previous prime is 6491083873. The next prime is 6491083909. The reversal of 6491083905 is 5093801946.

It is a happy number.

It is not a de Polignac number, because 6491083905 - 2⁵ = 6491083873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (6491083909) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30826 + ... + 118035.

It is an arithmetic number, because the mean of its divisors is an integer number (200963700).

Almost surely, 2^6491083905 is an apocalyptic number.

It is an amenable number.

6491083905 is a deficient number, since it is larger than the sum of its proper divisors (6370592895).

6491083905 is a wasteful number, since it uses less digits than its factorization.

6491083905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148911 (or 148905 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 6491083905 is about 80567.2632338967. The cubic root of 6491083905 is about 1865.4018693776.

The spelling of 6491083905 in words is "six billion, four hundred ninety-one million, eighty-three thousand, nine hundred five".