105698357906 has 4 divisors (see below), whose sum is σ = 158547536862. Its totient is φ = 52849178952.

The previous prime is 105698357887. The next prime is 105698357909. The reversal of 105698357906 is 609753896501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 609753896501 = 80107 ⋅7611743.

It can be written as a sum of positive squares in only one way, i.e., 86333130625 + 19365227281 = 293825^2 + 139159^2 .

It is a super-2 number, since 2×105698357906² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105698357909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26424589475 + ... + 26424589478.

Almost surely, 2^105698357906 is an apocalyptic number.

105698357906 is a deficient number, since it is larger than the sum of its proper divisors (52849178956).

105698357906 is an equidigital number, since it uses as much as digits as its factorization.

105698357906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52849178955.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 105698357906 in words is "one hundred five billion, six hundred ninety-eight million, three hundred fifty-seven thousand, nine hundred six".