8212642642 has 16 divisors (see below), whose sum is σ = 13222292472. Its totient is φ = 3811829760.

The previous prime is 8212642597. The next prime is 8212642651. The reversal of 8212642642 is 2462462128.

It can be written as a sum of positive squares in 4 ways, for example, as 8087225041 + 125417601 = 89929^2 + 11199^2 .

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, 1651959 + ... + 1656922.

Almost surely, 2^8212642642 is an apocalyptic number.

8212642642 is a deficient number, since it is larger than the sum of its proper divisors (5009649830).

8212642642 is a wasteful number, since it uses less digits than its factorization.

8212642642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308973.

The product of its digits is 73728, while the sum is 37.

The square root of 8212642642 is about 90623.6318076030. The cubic root of 8212642642 is about 2017.5654952079.

The spelling of 8212642642 in words is "eight billion, two hundred twelve million, six hundred forty-two thousand, six hundred forty-two".