1560495491 has 2 divisors, whose sum is σ = 1560495492. Its totient is φ = 1560495490.

The previous prime is 1560495487. The next prime is 1560495619. The reversal of 1560495491 is 1945940651.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1560495491 - 2² = 1560495487 is a prime.

It is not a weakly prime, because it can be changed into another prime (1560495401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780247745 + 780247746.

It is an arithmetic number, because the mean of its divisors is an integer number (780247746).

Almost surely, 2^1560495491 is an apocalyptic number.

1560495491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1560495491 is an equidigital number, since it uses as much as digits as its factorization.

1560495491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1560495491 is about 39503.1073587889. The cubic root of 1560495491 is about 1159.9007770362.

The spelling of 1560495491 in words is "one billion, five hundred sixty million, four hundred ninety-five thousand, four hundred ninety-one".