84963159781 has 2 divisors, whose sum is σ = 84963159782. Its totient is φ = 84963159780.

The previous prime is 84963159767. The next prime is 84963159797. The reversal of 84963159781 is 18795136948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64093023556 + 20870136225 = 253166^2 + 144465^2 .

It is a cyclic number.

It is not a de Polignac number, because 84963159781 - 2⁷ = 84963159653 is a prime.

It is a super-2 number, since 2×84963159781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84963159761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42481579890 + 42481579891.

It is an arithmetic number, because the mean of its divisors is an integer number (42481579891).

Almost surely, 2^84963159781 is an apocalyptic number.

It is an amenable number.

84963159781 is a deficient number, since it is larger than the sum of its proper divisors (1).

84963159781 is an equidigital number, since it uses as much as digits as its factorization.

84963159781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 61.

The spelling of 84963159781 in words is "eighty-four billion, nine hundred sixty-three million, one hundred fifty-nine thousand, seven hundred eighty-one".