617282824981 has 2 divisors, whose sum is σ = 617282824982. Its totient is φ = 617282824980.

The previous prime is 617282824967. The next prime is 617282825011. The reversal of 617282824981 is 189428282716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 478905520900 + 138377304081 = 692030^2 + 371991^2 .

It is a cyclic number.

It is not a de Polignac number, because 617282824981 - 2¹⁹ = 617282300693 is a prime.

It is a super-2 number, since 2×617282824981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617282824931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308641412490 + 308641412491.

It is an arithmetic number, because the mean of its divisors is an integer number (308641412491).

Almost surely, 2^617282824981 is an apocalyptic number.

It is an amenable number.

617282824981 is a deficient number, since it is larger than the sum of its proper divisors (1).

617282824981 is an equidigital number, since it uses as much as digits as its factorization.

617282824981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6193152, while the sum is 58.

The spelling of 617282824981 in words is "six hundred seventeen billion, two hundred eighty-two million, eight hundred twenty-four thousand, nine hundred eighty-one".