8196425640 has 240 divisors, whose sum is σ = 29833263900. Its totient is φ = 2017446912.

The previous prime is 8196425603. The next prime is 8196425641. The reversal of 8196425640 is 465246918.

8196425640 is a `hidden beast` number, since 81 + 9 + 6 + 4 + 2 + 564 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 21734244 + 8174691396 = 4662^2 + 90414^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (8196425641) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 540076 + ... + 555044.

Almost surely, 2^8196425640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8196425640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14916631950).

8196425640 is an abundant number, since it is smaller than the sum of its proper divisors (21636838260).

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

8196425640 is a wasteful number, since it uses less digits than its factorization.

8196425640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15018 (or 14992 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 8196425640 is about 90534.1131286986. The cubic root of 8196425640 is about 2016.2366325128.

The spelling of 8196425640 in words is "eight billion, one hundred ninety-six million, four hundred twenty-five thousand, six hundred forty".