10261490891 has 2 divisors, whose sum is σ = 10261490892. Its totient is φ = 10261490890.

The previous prime is 10261490879. The next prime is 10261490893. The reversal of 10261490891 is 19809416201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10261490891 - 2²² = 10257296587 is a prime.

Together with 10261490893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10261490893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130745445 + 5130745446.

It is an arithmetic number, because the mean of its divisors is an integer number (5130745446).

Almost surely, 2^10261490891 is an apocalyptic number.

10261490891 is a deficient number, since it is larger than the sum of its proper divisors (1).

10261490891 is an equidigital number, since it uses as much as digits as its factorization.

10261490891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 10261490891 in words is "ten billion, two hundred sixty-one million, four hundred ninety thousand, eight hundred ninety-one".