8622273781 has 6 divisors (see below), whose sum is σ = 9477375446. Its totient is φ = 7838430600.

The previous prime is 8622273767. The next prime is 8622273817. The reversal of 8622273781 is 1873722268.

It can be written as a sum of positive squares in only one way, i.e., 5342879025 + 3279394756 = 73095^2 + 57266^2 .

It is not a de Polignac number, because 8622273781 - 2²¹ = 8620176629 is a prime.

It is a super-2 number, since 2×8622273781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8622273721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35629110 + ... + 35629351.

Almost surely, 2^8622273781 is an apocalyptic number.

It is an amenable number.

8622273781 is a deficient number, since it is larger than the sum of its proper divisors (855101665).

8622273781 is a wasteful number, since it uses less digits than its factorization.

8622273781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71258483 (or 71258472 counting only the distinct ones).

The product of its digits is 451584, while the sum is 46.

The square root of 8622273781 is about 92856.1994753177. The cubic root of 8622273781 is about 2050.5668692899.

The spelling of 8622273781 in words is "eight billion, six hundred twenty-two million, two hundred seventy-three thousand, seven hundred eighty-one".