651957943061 has 2 divisors, whose sum is σ = 651957943062. Its totient is φ = 651957943060.

The previous prime is 651957942967. The next prime is 651957943073. The reversal of 651957943061 is 160349759156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633426566161 + 18531376900 = 795881^2 + 136130^2 .

It is a cyclic number.

It is not a de Polignac number, because 651957943061 - 2³⁴ = 634778073877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 651957942988 and 651957943006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651957943661) 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, 325978971530 + 325978971531.

It is an arithmetic number, because the mean of its divisors is an integer number (325978971531).

Almost surely, 2^651957943061 is an apocalyptic number.

It is an amenable number.

651957943061 is a deficient number, since it is larger than the sum of its proper divisors (1).

651957943061 is an equidigital number, since it uses as much as digits as its factorization.

651957943061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6123600, while the sum is 56.

The spelling of 651957943061 in words is "six hundred fifty-one billion, nine hundred fifty-seven million, nine hundred forty-three thousand, sixty-one".