8627778642 has 32 divisors (see below), whose sum is σ = 19747832832. Its totient is φ = 2461680144.

The previous prime is 8627778617. The next prime is 8627778667. The reversal of 8627778642 is 2468777268.

It is an interprime number because it is at equal distance from previous prime (8627778617) and next prime (8627778667).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110748 + ... + 171815.

It is an arithmetic number, because the mean of its divisors is an integer number (617119776).

Almost surely, 2^8627778642 is an apocalyptic number.

8627778642 is an abundant number, since it is smaller than the sum of its proper divisors (11120054190).

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

8627778642 is a wasteful number, since it uses less digits than its factorization.

8627778642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283302.

The product of its digits is 12644352, while the sum is 57.

The square root of 8627778642 is about 92885.8366060187. The cubic root of 8627778642 is about 2051.0031689035.

The spelling of 8627778642 in words is "eight billion, six hundred twenty-seven million, seven hundred seventy-eight thousand, six hundred forty-two".