11137720705 has 4 divisors (see below), whose sum is σ = 13365264852. Its totient is φ = 8910176560.

The previous prime is 11137720673. The next prime is 11137720709. The reversal of 11137720705 is 50702773111.

It is a happy number.

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 7127411776 + 4010308929 = 84424^2 + 63327^2 .

It is not a de Polignac number, because 11137720705 - 2⁵ = 11137720673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11137720709) 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, 1113772066 + ... + 1113772075.

It is an arithmetic number, because the mean of its divisors is an integer number (3341316213).

Almost surely, 2^11137720705 is an apocalyptic number.

It is an amenable number.

11137720705 is a deficient number, since it is larger than the sum of its proper divisors (2227544147).

11137720705 is an equidigital number, since it uses as much as digits as its factorization.

11137720705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2227544146.

The product of its (nonzero) digits is 10290, while the sum is 34.

The spelling of 11137720705 in words is "eleven billion, one hundred thirty-seven million, seven hundred twenty thousand, seven hundred five".