6542667431 has 4 divisors (see below), whose sum is σ = 6542873664. Its totient is φ = 6542461200.

The previous prime is 6542667421. The next prime is 6542667433. The reversal of 6542667431 is 1347662456.

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 6542667431 - 2³⁰ = 5468925607 is a prime.

It is a super-2 number, since 2×6542667431² = 85612994225336279522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6542667433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44375 + ... + 122696.

It is an arithmetic number, because the mean of its divisors is an integer number (1635718416).

Almost surely, 2^6542667431 is an apocalyptic number.

6542667431 is a deficient number, since it is larger than the sum of its proper divisors (206233).

6542667431 is a wasteful number, since it uses less digits than its factorization.

6542667431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206232.

The product of its digits is 725760, while the sum is 44.

The square root of 6542667431 is about 80886.7568332419. The cubic root of 6542667431 is about 1870.3301800040.

The spelling of 6542667431 in words is "six billion, five hundred forty-two million, six hundred sixty-seven thousand, four hundred thirty-one".