17797427649 has 45 divisors (see below), whose sum is σ = 27140955699. Its totient is φ = 11670444360.

The previous prime is 17797427621. The next prime is 17797427689. The reversal of 17797427649 is 94672479771.

The square root of 17797427649 is 133407.

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

It can be written as a sum of positive squares in only one way, i.e., 578739249 + 17218688400 = 24057^2 + 131220^2 .

It is not a de Polignac number, because 17797427649 - 2¹⁷ = 17797296577 is a prime.

Its product of digits (37340352) is a multiple of the sum of its prime divisors (64).

It is not an unprimeable number, because it can be changed into a prime (17797427689) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 291761079 + ... + 291761139.

Almost surely, 2^17797427649 is an apocalyptic number.

17797427649 is the 133407-th square number.

17797427649 is the 66704-th centered octagonal number.

It is an amenable number.

17797427649 is a deficient number, since it is larger than the sum of its proper divisors (9343528050).

17797427649 is an frugal number, since it uses more digits than its factorization.

17797427649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 64 counting only the distinct ones).

The product of its digits is 37340352, while the sum is 63.

The spelling of 17797427649 in words is "seventeen billion, seven hundred ninety-seven million, four hundred twenty-seven thousand, six hundred forty-nine".