985737222649 has 3 divisors (see below), whose sum is σ = 985738215493. Its totient is φ = 985736229806.

The previous prime is 985737222643. The next prime is 985737222697. The reversal of 985737222649 is 946222737589.

The square root of 985737222649 is 992843.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 946222737589 = 173 ⋅5469495593.

It is not a de Polignac number, because 985737222649 - 2³ = 985737222641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (985737222641) 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 2 ways as a sum of consecutive naturals, for example, 496422 + ... + 1489264.

Almost surely, 2^985737222649 is an apocalyptic number.

985737222649 is the 992843-rd square number.

985737222649 is the 496422-nd centered octagonal number.

It is an amenable number.

985737222649 is a deficient number, since it is larger than the sum of its proper divisors (992844).

985737222649 is an frugal number, since it uses more digits than its factorization.

985737222649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985686 (or 992843 counting only the distinct ones).

The product of its digits is 91445760, while the sum is 64.

Multiplying 985737222649 by its sum of digits (64), we get a square (63087182249536 = 7942744²).

The spelling of 985737222649 in words is "nine hundred eighty-five billion, seven hundred thirty-seven million, two hundred twenty-two thousand, six hundred forty-nine".