105761680621 has 4 divisors (see below), whose sum is σ = 105762503644. Its totient is φ = 105760857600.

The previous prime is 105761680573. The next prime is 105761680691. The reversal of 105761680621 is 126086167501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28024434025 + 77737246596 = 167405^2 + 278814^2 .

It is a cyclic number.

It is not a de Polignac number, because 105761680621 - 2²¹ = 105759583469 is a prime.

It is a super-2 number, since 2×105761680621² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105761680691) 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, 172470 + ... + 491191.

It is an arithmetic number, because the mean of its divisors is an integer number (26440625911).

Almost surely, 2^105761680621 is an apocalyptic number.

It is an amenable number.

105761680621 is a deficient number, since it is larger than the sum of its proper divisors (823023).

105761680621 is an equidigital number, since it uses as much as digits as its factorization.

105761680621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823022.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 105761680621 in words is "one hundred five billion, seven hundred sixty-one million, six hundred eighty thousand, six hundred twenty-one".