611564449 has 2 divisors, whose sum is σ = 611564450. Its totient is φ = 611564448.

The previous prime is 611564431. The next prime is 611564483. The reversal of 611564449 is 944465116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535089424 + 76475025 = 23132^2 + 8745^2 .

It is a cyclic number.

It is not a de Polignac number, because 611564449 - 2⁵ = 611564417 is a prime.

It is a super-2 number, since 2×611564449² = 748022150561347202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (611564489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305782224 + 305782225.

It is an arithmetic number, because the mean of its divisors is an integer number (305782225).

Almost surely, 2^611564449 is an apocalyptic number.

It is an amenable number.

611564449 is a deficient number, since it is larger than the sum of its proper divisors (1).

611564449 is an equidigital number, since it uses as much as digits as its factorization.

611564449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 611564449 is about 24729.8291340640. The cubic root of 611564449 is about 848.8170159422.

The spelling of 611564449 in words is "six hundred eleven million, five hundred sixty-four thousand, four hundred forty-nine".