5105787881 has 2 divisors, whose sum is σ = 5105787882. Its totient is φ = 5105787880.

The previous prime is 5105787877. The next prime is 5105787887. The reversal of 5105787881 is 1887875015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5052366400 + 53421481 = 71080^2 + 7309^2 .

It is a cyclic number.

It is not a de Polignac number, because 5105787881 - 2² = 5105787877 is a prime.

It is a super-2 number, since 2×5105787881² = 52138139771532940322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5105787887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2552893940 + 2552893941.

It is an arithmetic number, because the mean of its divisors is an integer number (2552893941).

Almost surely, 2^5105787881 is an apocalyptic number.

It is an amenable number.

5105787881 is a deficient number, since it is larger than the sum of its proper divisors (1).

5105787881 is an equidigital number, since it uses as much as digits as its factorization.

5105787881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 627200, while the sum is 50.

The square root of 5105787881 is about 71454.7960671640. The cubic root of 5105787881 is about 1721.9515303159.

The spelling of 5105787881 in words is "five billion, one hundred five million, seven hundred eighty-seven thousand, eight hundred eighty-one".