2188306690997 has 16 divisors (see below), whose sum is σ = 2628247324032. Its totient is φ = 1782555284160.

The previous prime is 2188306690967. The next prime is 2188306691003. The reversal of 2188306690997 is 7990966038812.

It is not a de Polignac number, because 2188306690997 - 2¹⁰ = 2188306689973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188306690967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98233754 + ... + 98256027.

It is an arithmetic number, because the mean of its divisors is an integer number (164265457752).

Almost surely, 2^{2188306690997} is an apocalyptic number.

It is an amenable number.

2188306690997 is a deficient number, since it is larger than the sum of its proper divisors (439940633035).

2188306690997 is a wasteful number, since it uses less digits than its factorization.

2188306690997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196489868.

The product of its (nonzero) digits is 70543872, while the sum is 68.

The spelling of 2188306690997 in words is "two trillion, one hundred eighty-eight billion, three hundred six million, six hundred ninety thousand, nine hundred ninety-seven".