6428215049 has 4 divisors (see below), whose sum is σ = 6806345364. Its totient is φ = 6050084736.

The previous prime is 6428215043. The next prime is 6428215061. The reversal of 6428215049 is 9405128246.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3612851449 + 2815363600 = 60107^2 + 53060^2 .

It is a cyclic number.

It is not a de Polignac number, because 6428215049 - 2¹⁶ = 6428149513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6428214997 and 6428215015.

It is not an unprimeable number, because it can be changed into a prime (6428215043) 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, 189065132 + ... + 189065165.

It is an arithmetic number, because the mean of its divisors is an integer number (1701586341).

Almost surely, 2^6428215049 is an apocalyptic number.

It is an amenable number.

6428215049 is a deficient number, since it is larger than the sum of its proper divisors (378130315).

6428215049 is a wasteful number, since it uses less digits than its factorization.

6428215049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378130314.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 6428215049 is about 80176.1501258323. The cubic root of 6428215049 is about 1859.3599224516.

The spelling of 6428215049 in words is "six billion, four hundred twenty-eight million, two hundred fifteen thousand, forty-nine".