17898961369 has 9 divisors (see below), whose sum is σ = 17997296223. Its totient is φ = 17801163072.

The previous prime is 17898961357. The next prime is 17898961373. The reversal of 17898961369 is 96316989871.

The square root of 17898961369 is 133787.

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., 7271825625 + 10627135744 = 85275^2 + 103088^2 .

It is not a de Polignac number, because 17898961369 - 2²¹ = 17896864217 is a prime.

It is a super-2 number, since 2×17898961369² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17898968369) 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, 47226622 + ... + 47227000.

Almost surely, 2^17898961369 is an apocalyptic number.

17898961369 is the 133787-th square number.

17898961369 is the 66894-th centered octagonal number.

It is an amenable number.

17898961369 is a deficient number, since it is larger than the sum of its proper divisors (98334854).

17898961369 is an frugal number, since it uses more digits than its factorization.

17898961369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464 (or 732 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 67.

The spelling of 17898961369 in words is "seventeen billion, eight hundred ninety-eight million, nine hundred sixty-one thousand, three hundred sixty-nine".