6478634842 has 8 divisors (see below), whose sum is σ = 9720364500. Its totient is φ = 3238513344.

The previous prime is 6478634819. The next prime is 6478634857. The reversal of 6478634842 is 2484368746.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6021915201 + 456719641 = 77601^2 + 21371^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6478634842.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391917 + ... + 408112.

Almost surely, 2^6478634842 is an apocalyptic number.

6478634842 is a deficient number, since it is larger than the sum of its proper divisors (3241729658).

6478634842 is a wasteful number, since it uses less digits than its factorization.

6478634842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804080.

The product of its digits is 6193152, while the sum is 52.

The square root of 6478634842 is about 80489.9673375508. The cubic root of 6478634842 is about 1864.2085726702.

The spelling of 6478634842 in words is "six billion, four hundred seventy-eight million, six hundred thirty-four thousand, eight hundred forty-two".