654251064989 has 2 divisors, whose sum is σ = 654251064990. Its totient is φ = 654251064988.

The previous prime is 654251064967. The next prime is 654251065031. The reversal of 654251064989 is 989460152456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 641016403225 + 13234661764 = 800635^2 + 115042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654251064989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654251064919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327125532494 + 327125532495.

It is an arithmetic number, because the mean of its divisors is an integer number (327125532495).

Almost surely, 2^654251064989 is an apocalyptic number.

It is an amenable number.

654251064989 is a deficient number, since it is larger than the sum of its proper divisors (1).

654251064989 is an equidigital number, since it uses as much as digits as its factorization.

654251064989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18662400, while the sum is 59.

The spelling of 654251064989 in words is "six hundred fifty-four billion, two hundred fifty-one million, sixty-four thousand, nine hundred eighty-nine".