3654661888089 has 45 divisors (see below), whose sum is σ = 5485074922789. Its totient is φ = 2425051248840.

The previous prime is 3654661888081. The next prime is 3654661888099. The reversal of 3654661888089 is 9808881664563.

It is a happy number.

The square root of 3654661888089 is 1911717.

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

3654661888089 is a `hidden beast` number, since 3 + 6 + 5 + 466 + 1 + 8 + 8 + 80 + 89 = 666.

It is not a de Polignac number, because 3654661888089 - 2³ = 3654661888081 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3654661888081) 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, 5350895542 + ... + 5350896224.

Almost surely, 2^{3654661888089} is an apocalyptic number.

3654661888089 is the 1911717-th square number.

3654661888089 is the 955859-th centered octagonal number.

It is an amenable number.

3654661888089 is a deficient number, since it is larger than the sum of its proper divisors (1830413034700).

3654661888089 is an frugal number, since it uses more digits than its factorization.

3654661888089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 477757440, while the sum is 72.

The spelling of 3654661888089 in words is "three trillion, six hundred fifty-four billion, six hundred sixty-one million, eight hundred eighty-eight thousand, eighty-nine".