1610611649 has 2 divisors, whose sum is σ = 1610611650. Its totient is φ = 1610611648.

The previous prime is 1610611619. The next prime is 1610611687. The reversal of 1610611649 is 9461160161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1610577424 + 34225 = 40132^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 1610611649 - 2⁸ = 1610611393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1610611619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805305824 + 805305825.

It is an arithmetic number, because the mean of its divisors is an integer number (805305825).

Almost surely, 2^1610611649 is an apocalyptic number.

It is an amenable number.

1610611649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1610611649 is an equidigital number, since it uses as much as digits as its factorization.

1610611649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1610611649 is about 40132.4264030970. The cubic root of 1610611649 is about 1172.1871206721.

The spelling of 1610611649 in words is "one billion, six hundred ten million, six hundred eleven thousand, six hundred forty-nine".