10505272891 has 2 divisors, whose sum is σ = 10505272892. Its totient is φ = 10505272890.

The previous prime is 10505272879. The next prime is 10505272909. The reversal of 10505272891 is 19827250501.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10505272891 - 2⁷ = 10505272763 is a prime.

It is a super-2 number, since 2×10505272891² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10505272801) 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, 5252636445 + 5252636446.

It is an arithmetic number, because the mean of its divisors is an integer number (5252636446).

Almost surely, 2^10505272891 is an apocalyptic number.

10505272891 is a deficient number, since it is larger than the sum of its proper divisors (1).

10505272891 is an equidigital number, since it uses as much as digits as its factorization.

10505272891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 40.

The spelling of 10505272891 in words is "ten billion, five hundred five million, two hundred seventy-two thousand, eight hundred ninety-one".