11101993957 has 8 divisors (see below), whose sum is σ = 11295932760. Its totient is φ = 10909186560.

The previous prime is 11101993921. The next prime is 11101993963. The reversal of 11101993957 is 75939910111.

It is a Cunningham number, because it is equal to 105366²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 730404676 + 10371589281 = 27026^2 + 101841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11101993957 - 2¹¹ = 11101991909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101996957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263044 + ... + 302317.

It is an arithmetic number, because the mean of its divisors is an integer number (1411991595).

Almost surely, 2^11101993957 is an apocalyptic number.

It is an amenable number.

11101993957 is a deficient number, since it is larger than the sum of its proper divisors (193938803).

11101993957 is an equidigital number, since it uses as much as digits as its factorization.

11101993957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565703.

The product of its (nonzero) digits is 76545, while the sum is 46.

The spelling of 11101993957 in words is "eleven billion, one hundred one million, nine hundred ninety-three thousand, nine hundred fifty-seven".