8651155649 has 2 divisors, whose sum is σ = 8651155650. Its totient is φ = 8651155648.

The previous prime is 8651155633. The next prime is 8651155651. The reversal of 8651155649 is 9465511568.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8074819600 + 576336049 = 89860^2 + 24007^2 .

It is a cyclic number.

It is not a de Polignac number, because 8651155649 - 2⁴ = 8651155633 is a prime.

It is a super-2 number, since 2×8651155649² (a number of 21 digits) contains 22 as substring.

Together with 8651155651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 8651155597 and 8651155606.

It is not a weakly prime, because it can be changed into another prime (8651145649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4325577824 + 4325577825.

It is an arithmetic number, because the mean of its divisors is an integer number (4325577825).

Almost surely, 2^8651155649 is an apocalyptic number.

It is an amenable number.

8651155649 is a deficient number, since it is larger than the sum of its proper divisors (1).

8651155649 is an equidigital number, since it uses as much as digits as its factorization.

8651155649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296000, while the sum is 50.

The square root of 8651155649 is about 93011.5887887095. The cubic root of 8651155649 is about 2052.8538993136.

The spelling of 8651155649 in words is "eight billion, six hundred fifty-one million, one hundred fifty-five thousand, six hundred forty-nine".