6423855491 has 4 divisors (see below), whose sum is σ = 6424414272. Its totient is φ = 6423296712.

The previous prime is 6423855481. The next prime is 6423855499. The reversal of 6423855491 is 1945583246.

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 6423855491 - 2²² = 6419661187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6423855499) 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, 261776 + ... + 285261.

It is an arithmetic number, because the mean of its divisors is an integer number (1606103568).

Almost surely, 2^6423855491 is an apocalyptic number.

6423855491 is a deficient number, since it is larger than the sum of its proper divisors (558781).

6423855491 is a wasteful number, since it uses less digits than its factorization.

6423855491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558780.

The product of its digits is 1036800, while the sum is 47.

The square root of 6423855491 is about 80148.9581404525. The cubic root of 6423855491 is about 1858.9394936325.

The spelling of 6423855491 in words is "six billion, four hundred twenty-three million, eight hundred fifty-five thousand, four hundred ninety-one".