262921745861 has 2 divisors, whose sum is σ = 262921745862. Its totient is φ = 262921745860.

The previous prime is 262921745839. The next prime is 262921745897. The reversal of 262921745861 is 168547129262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254691808900 + 8229936961 = 504670^2 + 90719^2 .

It is a cyclic number.

It is not a de Polignac number, because 262921745861 - 2¹⁰ = 262921744837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (262921745461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131460872930 + 131460872931.

It is an arithmetic number, because the mean of its divisors is an integer number (131460872931).

Almost surely, 2^262921745861 is an apocalyptic number.

It is an amenable number.

262921745861 is a deficient number, since it is larger than the sum of its proper divisors (1).

262921745861 is an equidigital number, since it uses as much as digits as its factorization.

262921745861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 53.

The spelling of 262921745861 in words is "two hundred sixty-two billion, nine hundred twenty-one million, seven hundred forty-five thousand, eight hundred sixty-one".