20116761641566 has 8 divisors (see below), whose sum is σ = 30175247947320. Its totient is φ = 10058345659128.

The previous prime is 20116761641531. The next prime is 20116761641567. The reversal of 20116761641566 is 66514616761102.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116761641567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16859761 + ... + 18013468.

It is an arithmetic number, because the mean of its divisors is an integer number (3771905993415).

Almost surely, 2^{20116761641566} is an apocalyptic number.

20116761641566 is a deficient number, since it is larger than the sum of its proper divisors (10058486305754).

20116761641566 is a wasteful number, since it uses less digits than its factorization.

20116761641566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35161658.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 20116761641566 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred forty-one thousand, five hundred sixty-six".