11657217220994 has 4 divisors (see below), whose sum is σ = 17485825831494. Its totient is φ = 5828608610496.

The previous prime is 11657217220919. The next prime is 11657217220997. The reversal of 11657217220994 is 49902271275611.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11598077304025 + 59139916969 = 3405595^2 + 243187^2 .

It is not an unprimeable number, because it can be changed into a prime (11657217220997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2914304305247 + ... + 2914304305250.

Almost surely, 2^{11657217220994} is an apocalyptic number.

11657217220994 is a deficient number, since it is larger than the sum of its proper divisors (5828608610500).

11657217220994 is an equidigital number, since it uses as much as digits as its factorization.

11657217220994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5828608610499.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 11657217220994 in words is "eleven trillion, six hundred fifty-seven billion, two hundred seventeen million, two hundred twenty thousand, nine hundred ninety-four".