261006623671 has 2 divisors, whose sum is σ = 261006623672. Its totient is φ = 261006623670.

The previous prime is 261006623621. The next prime is 261006623747. The reversal of 261006623671 is 176326600162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261006623671 - 2¹³ = 261006615479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261006623621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130503311835 + 130503311836.

It is an arithmetic number, because the mean of its divisors is an integer number (130503311836).

Almost surely, 2^261006623671 is an apocalyptic number.

261006623671 is a deficient number, since it is larger than the sum of its proper divisors (1).

261006623671 is an equidigital number, since it uses as much as digits as its factorization.

261006623671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 261006623671 in words is "two hundred sixty-one billion, six million, six hundred twenty-three thousand, six hundred seventy-one".