651091273969 has 2 divisors, whose sum is σ = 651091273970. Its totient is φ = 651091273968.

The previous prime is 651091273961. The next prime is 651091273997. The reversal of 651091273969 is 969372190156.

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., 650756823025 + 334450944 = 806695^2 + 18288^2 .

It is a cyclic number.

It is not a de Polignac number, because 651091273969 - 2³ = 651091273961 is a prime.

It is a super-2 number, since 2×651091273969² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (651091273961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325545636984 + 325545636985.

It is an arithmetic number, because the mean of its divisors is an integer number (325545636985).

Almost surely, 2^651091273969 is an apocalyptic number.

It is an amenable number.

651091273969 is a deficient number, since it is larger than the sum of its proper divisors (1).

651091273969 is an equidigital number, since it uses as much as digits as its factorization.

651091273969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5511240, while the sum is 58.

The spelling of 651091273969 in words is "six hundred fifty-one billion, ninety-one million, two hundred seventy-three thousand, nine hundred sixty-nine".