862044008261 has 2 divisors, whose sum is σ = 862044008262. Its totient is φ = 862044008260.

The previous prime is 862044008251. The next prime is 862044008269. The reversal of 862044008261 is 162800440268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521997580036 + 340046428225 = 722494^2 + 583135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-862044008261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (862044008269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431022004130 + 431022004131.

It is an arithmetic number, because the mean of its divisors is an integer number (431022004131).

Almost surely, 2^862044008261 is an apocalyptic number.

It is an amenable number.

862044008261 is a deficient number, since it is larger than the sum of its proper divisors (1).

862044008261 is an equidigital number, since it uses as much as digits as its factorization.

862044008261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 41.

The spelling of 862044008261 in words is "eight hundred sixty-two billion, forty-four million, eight thousand, two hundred sixty-one".