8005661436 has 48 divisors (see below), whose sum is σ = 19194900480. Its totient is φ = 2595055680.

The previous prime is 8005661429. The next prime is 8005661441. The reversal of 8005661436 is 6341665008.

It is a junction number, because it is equal to n+sod(n) for n = 8005661394 and 8005661403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146925 + ... + 1153883.

It is an arithmetic number, because the mean of its divisors is an integer number (399893760).

Almost surely, 2^8005661436 is an apocalyptic number.

It is an amenable number.

8005661436 is an abundant number, since it is smaller than the sum of its proper divisors (11189239044).

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

8005661436 is a wasteful number, since it uses less digits than its factorization.

8005661436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594 (or 9592 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 8005661436 is about 89474.3618921085. The cubic root of 8005661436 is about 2000.4716750859.

The spelling of 8005661436 in words is "eight billion, five million, six hundred sixty-one thousand, four hundred thirty-six".