854315430781 has 2 divisors, whose sum is σ = 854315430782. Its totient is φ = 854315430780.

The previous prime is 854315430691. The next prime is 854315430799. The reversal of 854315430781 is 187034513458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 514153532025 + 340161898756 = 717045^2 + 583234^2 .

It is a cyclic number.

It is not a de Polignac number, because 854315430781 - 2¹⁷ = 854315299709 is a prime.

It is a super-2 number, since 2×854315430781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (854315430181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427157715390 + 427157715391.

It is an arithmetic number, because the mean of its divisors is an integer number (427157715391).

Almost surely, 2^854315430781 is an apocalyptic number.

It is an amenable number.

854315430781 is a deficient number, since it is larger than the sum of its proper divisors (1).

854315430781 is an equidigital number, since it uses as much as digits as its factorization.

854315430781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 854315430781 in words is "eight hundred fifty-four billion, three hundred fifteen million, four hundred thirty thousand, seven hundred eighty-one".