6491435263 has 4 divisors (see below), whose sum is σ = 6518596320. Its totient is φ = 6464274208.

The previous prime is 6491435219. The next prime is 6491435267. The reversal of 6491435263 is 3625341946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6491435263 - 2¹³ = 6491427071 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 (6491435267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13580170 + ... + 13580647.

It is an arithmetic number, because the mean of its divisors is an integer number (1629649080).

Almost surely, 2^6491435263 is an apocalyptic number.

6491435263 is a deficient number, since it is larger than the sum of its proper divisors (27161057).

6491435263 is a wasteful number, since it uses less digits than its factorization.

6491435263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27161056.

The product of its digits is 466560, while the sum is 43.

The square root of 6491435263 is about 80569.4437302381. The cubic root of 6491435263 is about 1865.4355264193.

The spelling of 6491435263 in words is "six billion, four hundred ninety-one million, four hundred thirty-five thousand, two hundred sixty-three".