8278045642 has 4 divisors (see below), whose sum is σ = 12417068466. Its totient is φ = 4139022820.

The previous prime is 8278045639. The next prime is 8278045651. The reversal of 8278045642 is 2465408728.

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., 5617652401 + 2660393241 = 74951^2 + 51579^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8278045592 and 8278045601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069511409 + ... + 2069511412.

Almost surely, 2^8278045642 is an apocalyptic number.

8278045642 is a deficient number, since it is larger than the sum of its proper divisors (4139022824).

8278045642 is a wasteful number, since it uses less digits than its factorization.

8278045642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139022823.

The product of its (nonzero) digits is 860160, while the sum is 46.

The square root of 8278045642 is about 90983.7658156663. The cubic root of 8278045642 is about 2022.9071008516.

The spelling of 8278045642 in words is "eight billion, two hundred seventy-eight million, forty-five thousand, six hundred forty-two".