658890981841 has 9 divisors (see below), whose sum is σ = 662381018121. Its totient is φ = 655419251124.

The previous prime is 658890981821. The next prime is 658890981857. The reversal of 658890981841 is 148189098856.

The square root of 658890981841 is 811721.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 658890981841 - 2¹⁷ = 658890850769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (658890981811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 161530440 + ... + 161534518.

Almost surely, 2^658890981841 is an apocalyptic number.

658890981841 is the 811721-st square number.

658890981841 is the 405861-st centered octagonal number.

It is an amenable number.

658890981841 is a deficient number, since it is larger than the sum of its proper divisors (3490036280).

658890981841 is an frugal number, since it uses more digits than its factorization.

658890981841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8556 (or 4278 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 67.

The spelling of 658890981841 in words is "six hundred fifty-eight billion, eight hundred ninety million, nine hundred eighty-one thousand, eight hundred forty-one".