10261166491 has 2 divisors, whose sum is σ = 10261166492. Its totient is φ = 10261166490.

The previous prime is 10261166417. The next prime is 10261166521. The reversal of 10261166491 is 19466116201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10261166491 - 2²³ = 10252777883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10261166491.

It is not a weakly prime, because it can be changed into another prime (10261160491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130583245 + 5130583246.

It is an arithmetic number, because the mean of its divisors is an integer number (5130583246).

Almost surely, 2^10261166491 is an apocalyptic number.

10261166491 is a deficient number, since it is larger than the sum of its proper divisors (1).

10261166491 is an equidigital number, since it uses as much as digits as its factorization.

10261166491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 10261166491 in words is "ten billion, two hundred sixty-one million, one hundred sixty-six thousand, four hundred ninety-one".