1560510661 has 2 divisors, whose sum is σ = 1560510662. Its totient is φ = 1560510660.

The previous prime is 1560510659. The next prime is 1560510673. The reversal of 1560510661 is 1660150651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1429293636 + 131217025 = 37806^2 + 11455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1560510661 - 2¹ = 1560510659 is a prime.

Together with 1560510659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1560510361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780255330 + 780255331.

It is an arithmetic number, because the mean of its divisors is an integer number (780255331).

Almost surely, 2^1560510661 is an apocalyptic number.

It is an amenable number.

1560510661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1560510661 is an equidigital number, since it uses as much as digits as its factorization.

1560510661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1560510661 is about 39503.2993685338. The cubic root of 1560510661 is about 1159.9045355940.

The spelling of 1560510661 in words is "one billion, five hundred sixty million, five hundred ten thousand, six hundred sixty-one".