651320537429 has 2 divisors, whose sum is σ = 651320537430. Its totient is φ = 651320537428.

The previous prime is 651320537423. The next prime is 651320537431. The reversal of 651320537429 is 924735023156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 348127140529 + 303193396900 = 590023^2 + 550630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651320537429 is a prime.

Together with 651320537431, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651320537423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325660268714 + 325660268715.

It is an arithmetic number, because the mean of its divisors is an integer number (325660268715).

Almost surely, 2^651320537429 is an apocalyptic number.

It is an amenable number.

651320537429 is a deficient number, since it is larger than the sum of its proper divisors (1).

651320537429 is an equidigital number, since it uses as much as digits as its factorization.

651320537429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 651320537429 in words is "six hundred fifty-one billion, three hundred twenty million, five hundred thirty-seven thousand, four hundred twenty-nine".