102742651105 has 4 divisors (see below), whose sum is σ = 123291181332. Its totient is φ = 82194120880.

The previous prime is 102742650979. The next prime is 102742651163. The reversal of 102742651105 is 501156247201.

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 23258690064 + 79483961041 = 152508^2 + 281929^2 .

It is not a de Polignac number, because 102742651105 - 2⁷ = 102742650977 is a prime.

It is a Duffinian 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, 10274265106 + ... + 10274265115.

It is an arithmetic number, because the mean of its divisors is an integer number (30822795333).

Almost surely, 2^102742651105 is an apocalyptic number.

It is an amenable number.

102742651105 is a deficient number, since it is larger than the sum of its proper divisors (20548530227).

102742651105 is an equidigital number, since it uses as much as digits as its factorization.

102742651105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20548530226.

The product of its (nonzero) digits is 16800, while the sum is 34.

Adding to 102742651105 its reverse (501156247201), we get a palindrome (603898898306).

The spelling of 102742651105 in words is "one hundred two billion, seven hundred forty-two million, six hundred fifty-one thousand, one hundred five".