8145436698 has 72 divisors (see below), whose sum is σ = 20553991380. Its totient is φ = 2324528640.

The previous prime is 8145436681. The next prime is 8145436703. The reversal of 8145436698 is 8966345418.

8145436698 is a `hidden beast` number, since 8 + 1 + 4 + 543 + 6 + 6 + 98 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4695401529 + 3450035169 = 68523^2 + 58737^2 .

It is a super-2 number, since 2×8145436698² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 814408 + ... + 824348.

Almost surely, 2^8145436698 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8145436698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10276995690).

8145436698 is an abundant number, since it is smaller than the sum of its proper divisors (12408554682).

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

8145436698 is a wasteful number, since it uses less digits than its factorization.

8145436698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10892 (or 10882 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 8145436698 is about 90252.0730953035. The cubic root of 8145436698 is about 2012.0470138627.

The spelling of 8145436698 in words is "eight billion, one hundred forty-five million, four hundred thirty-six thousand, six hundred ninety-eight".