500025552781 has 2 divisors, whose sum is σ = 500025552782. Its totient is φ = 500025552780.

The previous prime is 500025552769. The next prime is 500025552791. The reversal of 500025552781 is 187255520005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366913678756 + 133111874025 = 605734^2 + 364845^2 .

It is a cyclic number.

It is not a de Polignac number, because 500025552781 - 2¹³ = 500025544589 is a prime.

It is a super-2 number, since 2×500025552781² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500025552701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250012776390 + 250012776391.

It is an arithmetic number, because the mean of its divisors is an integer number (250012776391).

Almost surely, 2^500025552781 is an apocalyptic number.

It is an amenable number.

500025552781 is a deficient number, since it is larger than the sum of its proper divisors (1).

500025552781 is an equidigital number, since it uses as much as digits as its factorization.

500025552781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140000, while the sum is 40.

The spelling of 500025552781 in words is "five hundred billion, twenty-five million, five hundred fifty-two thousand, seven hundred eighty-one".