8126361640 has 16 divisors (see below), whose sum is σ = 18284313780. Its totient is φ = 3250544640.

The previous prime is 8126361611. The next prime is 8126361647. The reversal of 8126361640 is 461636218.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8023501476 + 102860164 = 89574^2 + 10142^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 8126361640.

It is not an unprimeable number, because it can be changed into a prime (8126361647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101579481 + ... + 101579560.

Almost surely, 2^8126361640 is an apocalyptic number.

It is an amenable number.

8126361640 is an abundant number, since it is smaller than the sum of its proper divisors (10157952140).

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

8126361640 is a wasteful number, since it uses less digits than its factorization.

8126361640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203159052 (or 203159048 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 8126361640 is about 90146.3345899322. The cubic root of 8126361640 is about 2010.4751762221.

Adding to 8126361640 its reverse (461636218), we get a palindrome (8587997858).

The spelling of 8126361640 in words is "eight billion, one hundred twenty-six million, three hundred sixty-one thousand, six hundred forty".