1756116491 has 2 divisors, whose sum is σ = 1756116492. Its totient is φ = 1756116490.

The previous prime is 1756116449. The next prime is 1756116559. The reversal of 1756116491 is 1946116571.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1756116491 - 2²² = 1751922187 is a prime.

It is not a weakly prime, because it can be changed into another prime (1756116191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 878058245 + 878058246.

It is an arithmetic number, because the mean of its divisors is an integer number (878058246).

Almost surely, 2^1756116491 is an apocalyptic number.

1756116491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1756116491 is an equidigital number, since it uses as much as digits as its factorization.

1756116491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 1756116491 is about 41906.0436094843. The cubic root of 1756116491 is about 1206.4734627621.

The spelling of 1756116491 in words is "one billion, seven hundred fifty-six million, one hundred sixteen thousand, four hundred ninety-one".