651156656617 has 2 divisors, whose sum is σ = 651156656618. Its totient is φ = 651156656616.

The previous prime is 651156656569. The next prime is 651156656641. The reversal of 651156656617 is 716656651156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 556969660416 + 94186996201 = 746304^2 + 306899^2 .

It is a cyclic number.

It is not a de Polignac number, because 651156656617 - 2¹⁵ = 651156623849 is a prime.

It is not a weakly prime, because it can be changed into another prime (651156656687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325578328308 + 325578328309.

It is an arithmetic number, because the mean of its divisors is an integer number (325578328309).

Almost surely, 2^651156656617 is an apocalyptic number.

It is an amenable number.

651156656617 is a deficient number, since it is larger than the sum of its proper divisors (1).

651156656617 is an equidigital number, since it uses as much as digits as its factorization.

651156656617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804000, while the sum is 55.

The spelling of 651156656617 in words is "six hundred fifty-one billion, one hundred fifty-six million, six hundred fifty-six thousand, six hundred seventeen".