647057023061 has 2 divisors, whose sum is σ = 647057023062. Its totient is φ = 647057023060.

The previous prime is 647057023057. The next prime is 647057023069. The reversal of 647057023061 is 160320750746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376880576836 + 270176446225 = 613906^2 + 519785^2 .

It is a cyclic number.

It is not a de Polignac number, because 647057023061 - 2² = 647057023057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647057023069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323528511530 + 323528511531.

It is an arithmetic number, because the mean of its divisors is an integer number (323528511531).

Almost surely, 2^647057023061 is an apocalyptic number.

It is an amenable number.

647057023061 is a deficient number, since it is larger than the sum of its proper divisors (1).

647057023061 is an equidigital number, since it uses as much as digits as its factorization.

647057023061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 41.

The spelling of 647057023061 in words is "six hundred forty-seven billion, fifty-seven million, twenty-three thousand, sixty-one".