840465000077 has 2 divisors, whose sum is σ = 840465000078. Its totient is φ = 840465000076.

The previous prime is 840465000073. The next prime is 840465000103. The reversal of 840465000077 is 770000564048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 610814150116 + 229650849961 = 781546^2 + 479219^2 .

It is a cyclic number.

It is not a de Polignac number, because 840465000077 - 2² = 840465000073 is a prime.

It is a super-2 number, since 2×840465000077² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 840464999998 and 840465000043.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (840465000073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420232500038 + 420232500039.

It is an arithmetic number, because the mean of its divisors is an integer number (420232500039).

Almost surely, 2^840465000077 is an apocalyptic number.

It is an amenable number.

840465000077 is a deficient number, since it is larger than the sum of its proper divisors (1).

840465000077 is an equidigital number, since it uses as much as digits as its factorization.

840465000077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 840465000077 in words is "eight hundred forty billion, four hundred sixty-five million, seventy-seven", and thus it is an aban number.