647532066451 has 2 divisors, whose sum is σ = 647532066452. Its totient is φ = 647532066450.

The previous prime is 647532066443. The next prime is 647532066473. The reversal of 647532066451 is 154660235746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647532066451 - 2³ = 647532066443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 647532066395 and 647532066404.

It is not a weakly prime, because it can be changed into another prime (647532066421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323766033225 + 323766033226.

It is an arithmetic number, because the mean of its divisors is an integer number (323766033226).

Almost surely, 2^647532066451 is an apocalyptic number.

647532066451 is a deficient number, since it is larger than the sum of its proper divisors (1).

647532066451 is an equidigital number, since it uses as much as digits as its factorization.

647532066451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 647532066451 in words is "six hundred forty-seven billion, five hundred thirty-two million, sixty-six thousand, four hundred fifty-one".