6491806503 has 48 divisors (see below), whose sum is σ = 11193348096. Its totient is φ = 3313759680.

The previous prime is 6491806499. The next prime is 6491806537. The reversal of 6491806503 is 3056081946.

It is not a de Polignac number, because 6491806503 - 2² = 6491806499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491806543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4450 + ... + 114032.

It is an arithmetic number, because the mean of its divisors is an integer number (233194752).

Almost surely, 2^6491806503 is an apocalyptic number.

6491806503 is a deficient number, since it is larger than the sum of its proper divisors (4701541593).

6491806503 is a wasteful number, since it uses less digits than its factorization.

6491806503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109644 (or 109637 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 6491806503 is about 80571.7475483808. The cubic root of 6491806503 is about 1865.4710866642.

The spelling of 6491806503 in words is "six billion, four hundred ninety-one million, eight hundred six thousand, five hundred three".