20116761641605 has 4 divisors (see below), whose sum is σ = 24140113969932. Its totient is φ = 16093409313280.

The previous prime is 20116761641567. The next prime is 20116761641663. The reversal of 20116761641605 is 50614616761102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10591230009889 + 9525531631716 = 3254417^2 + 3086346^2 .

It is not a de Polignac number, because 20116761641605 - 2²³ = 20116753252997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011676164156 + ... + 2011676164165.

It is an arithmetic number, because the mean of its divisors is an integer number (6035028492483).

Almost surely, 2^{20116761641605} is an apocalyptic number.

It is an amenable number.

20116761641605 is a deficient number, since it is larger than the sum of its proper divisors (4023352328327).

20116761641605 is an equidigital number, since it uses as much as digits as its factorization.

20116761641605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023352328326.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 20116761641605 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred forty-one thousand, six hundred five".