840825063761 has 2 divisors, whose sum is σ = 840825063762. Its totient is φ = 840825063760.

The previous prime is 840825063719. The next prime is 840825063781. The reversal of 840825063761 is 167360528048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 638105404225 + 202719659536 = 798815^2 + 450244^2 .

It is a cyclic number.

It is not a de Polignac number, because 840825063761 - 2²² = 840820869457 is a prime.

It is not a weakly prime, because it can be changed into another prime (840825063781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420412531880 + 420412531881.

It is an arithmetic number, because the mean of its divisors is an integer number (420412531881).

Almost surely, 2^840825063761 is an apocalyptic number.

It is an amenable number.

840825063761 is a deficient number, since it is larger than the sum of its proper divisors (1).

840825063761 is an equidigital number, since it uses as much as digits as its factorization.

840825063761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 840825063761 in words is "eight hundred forty billion, eight hundred twenty-five million, sixty-three thousand, seven hundred sixty-one".