6428742636 has 24 divisors (see below), whose sum is σ = 15003136960. Its totient is φ = 2142523152.

The previous prime is 6428742623. The next prime is 6428742647. The reversal of 6428742636 is 6362478246.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23955 + ... + 115893.

Almost surely, 2^6428742636 is an apocalyptic number.

It is an amenable number.

6428742636 is an abundant number, since it is smaller than the sum of its proper divisors (8574394324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6428742636 is a wasteful number, since it uses less digits than its factorization.

6428742636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97773 (or 97771 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 48.

The square root of 6428742636 is about 80179.4402325185. The cubic root of 6428742636 is about 1859.4107892049.

The spelling of 6428742636 in words is "six billion, four hundred twenty-eight million, seven hundred forty-two thousand, six hundred thirty-six".