6436911842 has 4 divisors (see below), whose sum is σ = 9655367766. Its totient is φ = 3218455920.

The previous prime is 6436911839. The next prime is 6436911853. The reversal of 6436911842 is 2481196346.

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

It can be written as a sum of positive squares in only one way, i.e., 5170904281 + 1266007561 = 71909^2 + 35581^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6436911793 and 6436911802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609227959 + ... + 1609227962.

Almost surely, 2^6436911842 is an apocalyptic number.

6436911842 is a deficient number, since it is larger than the sum of its proper divisors (3218455924).

6436911842 is a wasteful number, since it uses less digits than its factorization.

6436911842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218455923.

The product of its digits is 248832, while the sum is 44.

The square root of 6436911842 is about 80230.3673305813. The cubic root of 6436911842 is about 1860.1980598048.

The spelling of 6436911842 in words is "six billion, four hundred thirty-six million, nine hundred eleven thousand, eight hundred forty-two".