5097556781 has 2 divisors, whose sum is σ = 5097556782. Its totient is φ = 5097556780.

The previous prime is 5097556747. The next prime is 5097556813. The reversal of 5097556781 is 1876557905.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3087469225 + 2010087556 = 55565^2 + 44834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5097556781 is a prime.

It is a super-2 number, since 2×5097556781² = 51970170271038163922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5097556481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2548778390 + 2548778391.

It is an arithmetic number, because the mean of its divisors is an integer number (2548778391).

Almost surely, 2^5097556781 is an apocalyptic number.

It is an amenable number.

5097556781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5097556781 is an equidigital number, since it uses as much as digits as its factorization.

5097556781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2646000, while the sum is 53.

The square root of 5097556781 is about 71397.1762816990. The cubic root of 5097556781 is about 1721.0257066003.

The spelling of 5097556781 in words is "five billion, ninety-seven million, five hundred fifty-six thousand, seven hundred eighty-one".