8915566513 has 12 divisors (see below), whose sum is σ = 10981239012. Its totient is φ = 7192389120.

The previous prime is 8915566507. The next prime is 8915566549. The reversal of 8915566513 is 3156655198.

It can be written as a sum of positive squares in 2 ways, for example, as 6054707344 + 2860859169 = 77812^2 + 53487^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8915566513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (8915566553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5350648 + ... + 5352313.

It is an arithmetic number, because the mean of its divisors is an integer number (915103251).

Almost surely, 2^8915566513 is an apocalyptic number.

It is an amenable number.

8915566513 is a deficient number, since it is larger than the sum of its proper divisors (2065672499).

8915566513 is a wasteful number, since it uses less digits than its factorization.

8915566513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10702992 (or 10702985 counting only the distinct ones).

The product of its digits is 972000, while the sum is 49.

The square root of 8915566513 is about 94422.2776308642. The cubic root of 8915566513 is about 2073.5586070818.

The spelling of 8915566513 in words is "eight billion, nine hundred fifteen million, five hundred sixty-six thousand, five hundred thirteen".