785185264081 has 2 divisors, whose sum is σ = 785185264082. Its totient is φ = 785185264080.

The previous prime is 785185264049. The next prime is 785185264093. The reversal of 785185264081 is 180462581587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 754797801681 + 30387462400 = 868791^2 + 174320^2 .

It is a cyclic number.

It is not a de Polignac number, because 785185264081 - 2⁵ = 785185264049 is a prime.

It is a super-2 number, since 2×785185264081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (785185264001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392592632040 + 392592632041.

It is an arithmetic number, because the mean of its divisors is an integer number (392592632041).

Almost surely, 2^785185264081 is an apocalyptic number.

It is an amenable number.

785185264081 is a deficient number, since it is larger than the sum of its proper divisors (1).

785185264081 is an equidigital number, since it uses as much as digits as its factorization.

785185264081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4300800, while the sum is 55.

The spelling of 785185264081 in words is "seven hundred eighty-five billion, one hundred eighty-five million, two hundred sixty-four thousand, eighty-one".