6501157109 has 2 divisors, whose sum is σ = 6501157110. Its totient is φ = 6501157108.

The previous prime is 6501157093. The next prime is 6501157121. The reversal of 6501157109 is 9017511056.

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., 3683883025 + 2817274084 = 60695^2 + 53078^2 .

It is a cyclic number.

It is not a de Polignac number, because 6501157109 - 2⁴ = 6501157093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6501157189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250578554 + 3250578555.

It is an arithmetic number, because the mean of its divisors is an integer number (3250578555).

Almost surely, 2^6501157109 is an apocalyptic number.

It is an amenable number.

6501157109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6501157109 is an equidigital number, since it uses as much as digits as its factorization.

6501157109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9450, while the sum is 35.

The square root of 6501157109 is about 80629.7532490333. The cubic root of 6501157109 is about 1866.3663134342.

The spelling of 6501157109 in words is "six billion, five hundred one million, one hundred fifty-seven thousand, one hundred nine".