1602634661 has 2 divisors, whose sum is σ = 1602634662. Its totient is φ = 1602634660.

The previous prime is 1602634637. The next prime is 1602634669. The reversal of 1602634661 is 1664362061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1285581025 + 317053636 = 35855^2 + 17806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1602634661 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1602634669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 801317330 + 801317331.

It is an arithmetic number, because the mean of its divisors is an integer number (801317331).

Almost surely, 2^1602634661 is an apocalyptic number.

It is an amenable number.

1602634661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1602634661 is an equidigital number, since it uses as much as digits as its factorization.

1602634661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 1602634661 is about 40032.9197161536. The cubic root of 1602634661 is about 1170.2487261888.

The spelling of 1602634661 in words is "one billion, six hundred two million, six hundred thirty-four thousand, six hundred sixty-one".