999845768461 has 2 divisors, whose sum is σ = 999845768462. Its totient is φ = 999845768460.

The previous prime is 999845768419. The next prime is 999845768543. The reversal of 999845768461 is 164867548999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785694323236 + 214151445225 = 886394^2 + 462765^2 .

It is a cyclic number.

It is not a de Polignac number, because 999845768461 - 2²⁹ = 999308897549 is a prime.

It is a pancake number, because a pancake can be divided into 999845768461 parts by 1414104 straight cuts.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999845768401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499922884230 + 499922884231.

It is an arithmetic number, because the mean of its divisors is an integer number (499922884231).

Almost surely, 2^999845768461 is an apocalyptic number.

It is an amenable number.

999845768461 is a deficient number, since it is larger than the sum of its proper divisors (1).

999845768461 is an equidigital number, since it uses as much as digits as its factorization.

999845768461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 940584960, while the sum is 76.

The spelling of 999845768461 in words is "nine hundred ninety-nine billion, eight hundred forty-five million, seven hundred sixty-eight thousand, four hundred sixty-one".