6542215679 has 8 divisors (see below), whose sum is σ = 6900243840. Its totient is φ = 6185557656.

The previous prime is 6542215661. The next prime is 6542215697. The reversal of 6542215679 is 9765122456.

It is an interprime number because it is at equal distance from previous prime (6542215661) and next prime (6542215697).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6542215679 - 2³² = 2247248383 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 (6542215699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332717 + ... + 351830.

It is an arithmetic number, because the mean of its divisors is an integer number (862530480).

Almost surely, 2^6542215679 is an apocalyptic number.

6542215679 is a deficient number, since it is larger than the sum of its proper divisors (358028161).

6542215679 is a wasteful number, since it uses less digits than its factorization.

6542215679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685069.

The product of its digits is 907200, while the sum is 47.

The square root of 6542215679 is about 80883.9642883557. The cubic root of 6542215679 is about 1870.2871320752.

The spelling of 6542215679 in words is "six billion, five hundred forty-two million, two hundred fifteen thousand, six hundred seventy-nine".