2188907485661 has 8 divisors (see below), whose sum is σ = 2380171248000. Its totient is φ = 2000913189552.

The previous prime is 2188907485649. The next prime is 2188907485697. The reversal of 2188907485661 is 1665847098812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2188907485661 - 2²⁶ = 2188840376797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188907487661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817365161 + ... + 817367838.

It is an arithmetic number, because the mean of its divisors is an integer number (297521406000).

Almost surely, 2^{2188907485661} is an apocalyptic number.

It is an amenable number.

2188907485661 is a deficient number, since it is larger than the sum of its proper divisors (191263762339).

2188907485661 is a wasteful number, since it uses less digits than its factorization.

2188907485661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634733115.

The product of its (nonzero) digits is 46448640, while the sum is 65.

The spelling of 2188907485661 in words is "two trillion, one hundred eighty-eight billion, nine hundred seven million, four hundred eighty-five thousand, six hundred sixty-one".