651017981297 has 2 divisors, whose sum is σ = 651017981298. Its totient is φ = 651017981296.

The previous prime is 651017981291. The next prime is 651017981413. The reversal of 651017981297 is 792189710156.

It is a happy number.

651017981297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436862833936 + 214155147361 = 660956^2 + 462769^2 .

It is a cyclic number.

It is not a de Polignac number, because 651017981297 - 2¹⁴ = 651017964913 is a prime.

It is not a weakly prime, because it can be changed into another prime (651017981291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325508990648 + 325508990649.

It is an arithmetic number, because the mean of its divisors is an integer number (325508990649).

Almost surely, 2^651017981297 is an apocalyptic number.

It is an amenable number.

651017981297 is a deficient number, since it is larger than the sum of its proper divisors (1).

651017981297 is an equidigital number, since it uses as much as digits as its factorization.

651017981297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1905120, while the sum is 56.

The spelling of 651017981297 in words is "six hundred fifty-one billion, seventeen million, nine hundred eighty-one thousand, two hundred ninety-seven".