505138114891 has 2 divisors, whose sum is σ = 505138114892. Its totient is φ = 505138114890.

The previous prime is 505138114889. The next prime is 505138114961. The reversal of 505138114891 is 198411831505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505138114891 - 2¹ = 505138114889 is a prime.

Together with 505138114889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (505138114991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252569057445 + 252569057446.

It is an arithmetic number, because the mean of its divisors is an integer number (252569057446).

Almost surely, 2^505138114891 is an apocalyptic number.

505138114891 is a deficient number, since it is larger than the sum of its proper divisors (1).

505138114891 is an equidigital number, since it uses as much as digits as its factorization.

505138114891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 46.

The spelling of 505138114891 in words is "five hundred five billion, one hundred thirty-eight million, one hundred fourteen thousand, eight hundred ninety-one".