105726680557 has 4 divisors (see below), whose sum is σ = 105734805820. Its totient is φ = 105718555296.

The previous prime is 105726680467. The next prime is 105726680597. The reversal of 105726680557 is 755086627501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 755086627501 = 83 ⋅9097429247.

It can be written as a sum of positive squares in 2 ways, for example, as 58667621796 + 47059058761 = 242214^2 + 216931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-105726680557 is a prime.

It is a super-2 number, since 2×105726680557² (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 (105726680597) 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, 4043082 + ... + 4069147.

It is an arithmetic number, because the mean of its divisors is an integer number (26433701455).

Almost surely, 2^105726680557 is an apocalyptic number.

It is an amenable number.

105726680557 is a deficient number, since it is larger than the sum of its proper divisors (8125263).

105726680557 is an equidigital number, since it uses as much as digits as its factorization.

105726680557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125262.

The product of its (nonzero) digits is 3528000, while the sum is 52.

The spelling of 105726680557 in words is "one hundred five billion, seven hundred twenty-six million, six hundred eighty thousand, five hundred fifty-seven".