650601731281 has 2 divisors, whose sum is σ = 650601731282. Its totient is φ = 650601731280.

The previous prime is 650601731279. The next prime is 650601731327. The reversal of 650601731281 is 182137106056.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407064416256 + 243537315025 = 638016^2 + 493495^2 .

It is a cyclic number.

It is not a de Polignac number, because 650601731281 - 2¹ = 650601731279 is a prime.

It is a super-2 number, since 2×650601731281² (a number of 24 digits) contains 22 as substring.

Together with 650601731279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (650601731261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325300865640 + 325300865641.

It is an arithmetic number, because the mean of its divisors is an integer number (325300865641).

Almost surely, 2^650601731281 is an apocalyptic number.

It is an amenable number.

650601731281 is a deficient number, since it is larger than the sum of its proper divisors (1).

650601731281 is an equidigital number, since it uses as much as digits as its factorization.

650601731281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 650601731281 in words is "six hundred fifty billion, six hundred one million, seven hundred thirty-one thousand, two hundred eighty-one".