8217773642 has 32 divisors (see below), whose sum is σ = 13423100544. Its totient is φ = 3750696000.

The previous prime is 8217773617. The next prime is 8217773647. The reversal of 8217773642 is 2463777128.

It is a super-2 number, since 2×8217773642² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8217773647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 886592 + ... + 895812.

It is an arithmetic number, because the mean of its divisors is an integer number (419471892).

Almost surely, 2^8217773642 is an apocalyptic number.

8217773642 is a deficient number, since it is larger than the sum of its proper divisors (5205326902).

8217773642 is a wasteful number, since it uses less digits than its factorization.

8217773642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614.

The product of its digits is 790272, while the sum is 47.

The square root of 8217773642 is about 90651.9367801924. The cubic root of 8217773642 is about 2017.9855781564.

The spelling of 8217773642 in words is "eight billion, two hundred seventeen million, seven hundred seventy-three thousand, six hundred forty-two".