2097668478889 has 9 divisors (see below), whose sum is σ = 2192871626589. Its totient is φ = 2006433638220.

The previous prime is 2097668478833. The next prime is 2097668478923. The reversal of 2097668478889 is 9888748667902.

It is a happy number.

The square root of 2097668478889 is 1448333.

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

It is not a de Polignac number, because 2097668478889 - 2¹³ = 2097668470697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2097668479889) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33280174 + ... + 33343144.

Almost surely, 2^{2097668478889} is an apocalyptic number.

2097668478889 is the 1448333-rd square number.

2097668478889 is the 724167-th centered octagonal number.

It is an amenable number.

2097668478889 is a deficient number, since it is larger than the sum of its proper divisors (95203147700).

2097668478889 is an frugal number, since it uses more digits than its factorization.

2097668478889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125988 (or 62994 counting only the distinct ones).

The product of its (nonzero) digits is 4682022912, while the sum is 82.

The spelling of 2097668478889 in words is "two trillion, ninety-seven billion, six hundred sixty-eight million, four hundred seventy-eight thousand, eight hundred eighty-nine".