451613609989 has 2 divisors, whose sum is σ = 451613609990. Its totient is φ = 451613609988.

The previous prime is 451613609933. The next prime is 451613610089. The reversal of 451613609989 is 989906316154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 425638808100 + 25974801889 = 652410^2 + 161167^2 .

It is a cyclic number.

It is not a de Polignac number, because 451613609989 - 2¹³ = 451613601797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451613609389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225806804994 + 225806804995.

It is an arithmetic number, because the mean of its divisors is an integer number (225806804995).

Almost surely, 2^451613609989 is an apocalyptic number.

It is an amenable number.

451613609989 is a deficient number, since it is larger than the sum of its proper divisors (1).

451613609989 is an equidigital number, since it uses as much as digits as its factorization.

451613609989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 451613609989 in words is "four hundred fifty-one billion, six hundred thirteen million, six hundred nine thousand, nine hundred eighty-nine".