6421158479 has 4 divisors (see below), whose sum is σ = 6458275176. Its totient is φ = 6384041784.

The previous prime is 6421158463. The next prime is 6421158493. The reversal of 6421158479 is 9748511246.

It is a happy number.

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 6421158479 - 2⁴ = 6421158463 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 (6421158439) 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, 18558089 + ... + 18558434.

It is an arithmetic number, because the mean of its divisors is an integer number (1614568794).

Almost surely, 2^6421158479 is an apocalyptic number.

6421158479 is a deficient number, since it is larger than the sum of its proper divisors (37116697).

6421158479 is a wasteful number, since it uses less digits than its factorization.

6421158479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37116696.

The product of its digits is 483840, while the sum is 47.

The square root of 6421158479 is about 80132.1313768703. The cubic root of 6421158479 is about 1858.6793028519.

The spelling of 6421158479 in words is "six billion, four hundred twenty-one million, one hundred fifty-eight thousand, four hundred seventy-nine".